OpenSystemsDevelopment / qpdf

…le handling. Add shared helper retrieval, validation methods, and update usages across the codebase.

Integrate `QPDFPageLabelDocumentHelper` with `QPDF` for improved page label handling. Add methods for retrieving shared helper instances, validating page label structures, and streamline usage throughout the codebase.

…or improved clarity and consistency, and remove unused test coverage entries.

… operator[] and `Name` for improved clarity and consistency, and remove unused test coverage entries.

…, and `Array` for improved clarity and consistency, and simplify `/Filter` and `/DecodeParms` handling.

…DecodeParms` using `Name`, `Dictionary`, and `Array` for improved clarity and consistency, and remove unused test coverage entries.

…tor[] for improved clarity and consistency, and remove unused test coverage entries.

…ame` for improved clarity and consistency, and simplify `/Identity` handling.

…ator[] for improved consistency and clarity, and remove unused test coverage entry.

…`Dictionary` and `Name` for improved clarity and consistency, and streamline `/Resources` and `/Font` handling.

…s for improved clarity and consistency.

…a map during the first pass, add custom comparator for sorting keys.

… redundant `initialized_dr_map` flag and directly checking `dr`.

…g with `Dictionary` and `Array`.

… with `std::deque` in `traverse_field` for better performance and simplify traversal logic.

…ield` function to increase code clarity.

…h `std::list<Dictionary>`, simplify `/Kids` handling, and update method calls for consistency.

…annotation` to increase code clarity.

…h operator[], update type handling for clarity and consistency, and streamline resource merging.

…ndling, replace `QPDFObjectHandle` with direct type usage, and remove redundant `QTC::TC` calls.

…, remove redundant `QTC::TC` call, and simplify type usage.

…e handling to improve clarity and consistency.

…roFormDocumentHelper`, replace redundant maps with `FieldData` encapsulation.

…n `QPDFWriter` and `QPDFJob`.

…eamFilter`, include necessary private headers.

…n `QPDFPageDocumentHelper`, `QPDFPageObjectHelper` and `QPDFPageLabelDocumentHelper`.

…n `QPDFOutlineObjectHelper` and `QPDFOutlineDocumentHelper`.

…s in `QPDFFormFieldObjectHelper`.

…n `QPDFAcroFormDocumentHelper`.

…emove redundant `QTC::TC` calls.

Fixes #1532.

…df::Dictionary`, update constructors, and streamline logic with `Dictionary` API.

…simplify iteration logic, update to use `Dictionary` API, and streamline error checks.

…with subscript operator, simplify logic, and improve error checks.

…h subscript operator, streamline `repair` with `Dictionary` initializer, and remove redundant semicolon.