OpenSystemsDevelopment / qpdf

…d calls, and streamline related logic for improved encapsulation and maintainability.

…with encapsulated `Config`, replace `qcf` with `d_cfg` for improved consistency, and adjust related logic for maintainability.

… `attempt_recovery` to `password_is_hex_key` and `suppress_recovery` to align with the CLI, update usage across the codebase, and streamline related logic.

…` methods, update usage across codebase, and streamline related logic.

…and replace it with a setter that directly sets `Input::password`, centralize password handling, simplify file processing, and adjust related logic in `handlePageSpecs`.

…input_entry`, centralize input file handling in `infile_name`, update `new_selection` logic, and simplify page range and input processing.

…file handling in `Inputs`, and simplify related logic.

…lePageSpecs` and `new_selection`, and simplify page specification handling.

…sing, and simplify page specification handling.

…n` method, and update logic for handling page specifications.

…DFJob_private.hh`, streamline includes, and reduce header dependencies.

…or deterministic ID generation (fixes #1235).

Refactor code to eliminate redundant `this->` qualifiers, enhancing readability and consistency across the codebase. This modification simplifies member variable access and aligns with modern C++ coding practices.

Replaced std::shared_ptr<char> with std::string for passwords in QPDFJob. This simplifies memory management and aligns the implementation with modern C++ standards, improving code readability and maintainability.

Replaced shared pointer usage with a plain std::string for passwords in PageSpec to simplify code and enhance readability. Updated relevant logic and function calls to align with this change, removing unnecessary shared pointer management. Updated TODO to reflect completion of this modernization step.

Replaced `std::shared_ptr<char>` with `std::string` for password fields to simplify memory management and improve clarity. Updated relevant method implementations and function calls accordingly. This change ensures more straightforward and safer password handling throughout the codebase.

Replaced raw shared pointers with std::string for `infilename` to improve simplicity and readability. Added a boolean `empty_input` flag to explicitly track empty input cases. Adjusted related logic and function calls accordingly for consistency.

Replaced shared_ptr<char> with std::string for `outfilename` in QPDFJob, simplifying its usage and reducing unnecessary memory management overhead. Updated related conditional checks and logic to align with the updated type. These changes improve code readability and maintainability.

Simplified checks for empty containers and strings across the codebase using the `.empty()` method. This improves code readability and adheres to best practices for checking emptiness.

Thanks to github user @cdosborn for the basic enhancement.

... to remove the /Root /StructTreeRoot and /MarkInfo entries.

Accept --file and --range as named parameters in additional to
allowing positional arguments. This is in preparation for adding
additional flags.

The check for the number of items was in the wrong place.

This commit contains only the manual changes. It is separated for
clarity. This commit would not pass CI because it lacks the automated
changes, which appear in the next commit.

Rather than adding yet another flag that is almost never useful on its
own, just have --remove-restrictions disable digital signatures. The
operations are still separate in the API.

Avd xcsv brvtns.

Now --json-output just changes defaults. Allow output file with --json.