OpenSystemsDevelopment / qpdf

Update README for C++20 requirement

Add script to validate private header files in isolation

Introduce `check-private-headers` script to ensure all private headers compile independently. Update `build-linux` script to include this new validation step. Adjust release notes to reflect the additional header checks.

Addresses the issue raised in #1465

Add `--remove-acroform` option to exclude AcroForm dictionary

Introduce a new `--remove-acroform` option to remove the interactive form dictionary from the document catalog. Update related documentation, tests, and release notes to reflect this new feature.

Fixes #1403

Refactor `FormNode::setRadioButtonValue` (fixes #1449)

Fix identification of radio button widgets by relying on the absence of `Kids` arrays.
Fix the exclusion of RadioButtonFields with parents.

Fixes #1449

Update copyrights

Tighten named destination validation in `QPDFOutlineDocumentHelper::r…

…Dest`: instead of accepting any Dictionary require a `/D` entry.

Enhance `AcroForm::transformAnnotations` to update '/P' field

Fix `Lin::readHintStream`

Reorder `no_ci_stop_if` call to avoid
insertion of an invalid object into the object cache if the hint stream is invalid

Refactor FormNode::generateTextAppearance

…t resource handling in `generateTextAppearance`.

…ance`: copy stream data if shared references exceed threshold, ensuring safe updates.

…r replace the appearance stream content with the generated appearance.

…g: ensure checks for dictionary annotations, streamline appearance creation flow, and replace manual key access with methods.

Minor adjustments to aid CLion use

Avoid confusing latest CLion version.

Allow empty name objects in qpdf JSON input parsing as permitted by t…

…ification; update release notes accordingly.

Fixes #1628

fix(doc): Fix a typo

Add copilot-instructions.md

Refactor FormNode

…hecks, replace manual key access with `FormNode` methods, and enhance maintainability.

… presence of a `/Parent` attribute as evidence that the node a form fields; however, it is also a (sometimes required) attribute of a pure widget annotation.

…roFormDocumentHelper` to use them instead of manual key checks

Update release notes