Peter M. Groen / CLI11

* Add missing Macros.hpp include to Error.hpp

To address:

```
In file included from /ITKWebAssemblyInterface/include/itkPipeline.h:21:
In file included from /ITKWebAssemblyInterface-build/_deps/cli11-src/include/CLI/App.hpp:25:
In file included from /ITKWebAssemblyInterface-build/_deps/cli11-src/include/CLI/ConfigFwd.hpp:17:
/ITKWebAssemblyInterface-build/_deps/cli11-src/include/CLI/Error.hpp:75:5: error: unknown type name 'CLI11_NODISCARD'
    CLI11_NODISCARD int get_exit_code() const { return actual_exit_code; }
    ^
```

* style: pre-commit.ci fixes

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

* chore: update clang-tidy

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* refactor: address clang-tidy

* fix: C++11 support

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* chore: two more clang-tidy fixes

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* fix: get_inject_separator should be bool

* refactor: addressing review feedback

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
Co-authored-by: Philip Top <phlptp@gmail.com>

* Apply suggestions from code review

* Update include/CLI/Config.hpp

* Update include/CLI/Config.hpp

* Update include/CLI/Config.hpp

* Update include/CLI/Config.hpp

Co-authored-by: Philip Top <phlptp@gmail.com>

* docs: fix some Codacity recommendations

* chore: update copyright year

* style: more codacity fixes

* style: fix issues reported by Codacity

* refactor: new version of MakeSingleFiles

* fix: use CMake and set version

* Fix internal header include paths.

The extra leading "CLI/" part of include directives prevents the inclusion
of CLI.hpp from a relative directory without an extra -I or /I compiler
directive.

* Fix single header generation script.

Files included with "" should be relative to the header file location first.

* Add a dedicated version option to CLI11 to facilitate use of version flags, similar to help flags

* add some test for the version flag

* update errors and formatting

* clear up gcc 4.8 warnings

* add a few more tests

* fix compiler error

* fix a few comments, and change default version flag to only use "--version"

* remove `version` calls and tests

* formatting and add `std::string version()`  back in.

* Add whitespace/comments check

* Adapt spacing in clang-format

* Fix cpplint whitespace/comments issues

* Grammar

* Do not use clang-format for comment spacing

* Fix with clang-format pre-commit hook

* spelling: argument

* spelling: conflicts

* spelling: correctly

* spelling: default

* spelling: description

* spelling: empty

* spelling: enum

* spelling: javascript

* spelling: modifying

* spelling: nonexistent

* spelling: plumbum

* spelling: programmatically

* spelling: received

* spelling: replaced

* spelling: required

* spelling: sanitizers

* spelling: semicolon

* spelling: source

* spelling: subcommands

* spelling: successful

* Add copyright check

* Remove old license message

* Implement suggestions from code review

* Add build/include_what_you_use to cpplint checks

* Fix all cpplint build/include_what_you_use issues

* Make CI fail with readability-container-size-empty flag

* Make CI fail with cppcoreguidelines-owning-memory flag

* Add all google checks, exclude specific ones

* Apply clang-tidy fixes

* Make timer constructors explicit

* Add check for unscoped namespaces

* Replace unscoped namespace by using-declaration

* Replace unscoped namespace by using-declaration

* add expanded type_size specification

* add some more checks for type_size_max

* continued work on getting type sizes more flexible

* make some more tweaks to option to split up validate and reduce sections

* git rid of exceptions on the type_size functions exceptions,  allow any number to be entered for the min and max and don't make a distinction between flags and other types.

* add expected count

* add the allow extra args flag in an option

* start working in allow_extra_args

* write some stuff in the book,  and continue working on the failing test cases

* fix a few more of the helpers tests

* a few more test cases running

* all tests pass, fixing calls in ini files

* get vector<pair> working and all tests passing

* change callback to use reference to remove allocation and copy operation

* add support and test for vector<vector<X>>

* change Validators_ to validators_ for consistency

* fix linux warnings and errors by reording some templates and adding some typename keywords

* add support for std::vector<X> as the cross conversion type so optional<std::vector<X>> is supported using the full template of add_option.

* a few more test cases to take care of some coverage gaps

* add missing parenthesis

* add some more tests for coverage gaps

* add test for flag like option

* add transform test for `as<X>` function and make it pass through the defaults

* add a few more tests and have vector default string interpreted correctly.

* add test for defaulted integer,  and route default string for defaulted value which would otherwise be empty

* some code cleanup and comments and few more test coverage gap tests

* add more tests and fix a few bugs on the type size and different code paths

* remove path in results by fixing the clear of options so they go back to parsing state.

* get coverage back to 100%

* clang_tidy, and codacy fixes

* reorder the lexical_conversion definitions

* update some formatting

* update whitespace on book chapter

fix incorrect parenthesis

update some clang-tidy fixes mainly else after return but a few conversions from into to bool

add extra newline before footer

add an extra field to the extra Error

add a footer callback for help operations

* change the move function to _move_option and add an additional test

add a validation check on min options to make sure it is even possible to succeed.

add some additional tests to cover code paths and potential errors.

add a number of additional tests and checks and fix some issues with the add function in option_groups

clean up example and help formatting

add option_groups example to play with

move create_option_group to a member function using a dummy template

add some optionGroup tests

add min and max options calls and an associated Error call

* add ranges example,  add excludes to app for options and subcommands.

* add some tests on ranges, and some subcommand tests with exclusion

* add tests in optionGroups for some invalid inputs

* add required option to subcommands and option_groups

* add disabled flag

* add disable option to subcommands and some more tests

* start work on ReadMe modifications

* update the readme with descriptions of function and methods added for option_groups

* clear up gcc 4.7 warnings

* some update to the Readme and a few more warnings fixed

* Minor readme touchup

add some comments in readME about performance

move operator[] to return const Option *

Apply suggestions from code review

Co-Authored-By: phlptp <top1@llnl.gov>

update readme and add some IniTests and fix a bug from the tests

add_flag_callback

add a few tests to capture the different paths

fix incorrectly updated CMAKE file, and add some subcommand test for option finding

add disable_flag_override and work out some kinks in the find option functions

add some more tests and fix a few bugs in as<> function for options

Allow general flag types and default values, add shortcut notation for retrieving values

* Clear up Wshadow warnings from gcc 4.9.  Most of these were local variable names with the same name as a member function.
Also a few spelling fixes and adding some std::move around some of the arguments when appropriate.

* Touchup

in progress: formatters

Getting closer

Working on apps

One test actually runs

All builds, added filter functions

Reverting a few behavours as needed

Repairs

All tests pass

Fixing error with adding help flag

Labels are simpler mappings, normalized setters

Adding help_all

Adding a few more tests

One more line tested

Adding one more check

Adding to readme

Simplify naming

Adding default constructors

Fixing spacing issues with subcommand all printout

Adding a couple of tests

* Adding nicer header with LICENSE to single file version

* Adding badges

* Clean up sh files

* Adding explicit in a few places

* More fixes from codacy

Some error codes are renamed