OpenSystemsDevelopment / qpdf

…dding error counting and leveraging `reconstructed_xref` for improved robustness, limiting the acceptable number of errors for damaged files.

Add check for shared appearance stream in QPDFFormFieldObjectHelper

Ensure an appearance stream is not shared  before generating text appearances, improving error handling and data integrity.

Refactor is::OffsetBuffer and BufferInputSource

…string`, improving performance, simplifying stream data handling, and reducing dependency on `BufferInputSource`.

…std::string_view`, improving performance and code clarity.

…ancy and improving initialization consistency.

…ndant methods for improved code clarity.

…ng encapsulation and maintainability.

Simplify QPDFWriter pipeline management

Replaced raw key pointer and length parameters with a `std::string` in `Pl_AES_PDF` and `Pl_RC4` constructors for improved safety and clarity. Updated all usage sites accordingly, reducing reliance on manual memory management and redundant conversions.

…proved clarity and reduced indirection in pipeline management.

…proved clarity and reduced indirection in pipeline management.

…buffer handling and streamline compression.

…n and improve separation of concerns.

Refactor the QPDFWriter pipeline stack

…pping, remove redundant `PipelinePopper` usage, and improve encapsulation of MD5 handling.

# Conflicts:
#	libqpdf/QPDFWriter.cc

…implifying ID management and ensuring consistent initialization.

…y management and eliminate redundant `dynamic_cast` logic.

…, improving encapsulation and memory management. Remove the now redundant `pushMD5Pipeline` method and streamline MD5 activation.

…line `linearization pass1` logic  when writing pass1 file

…te encryption handling

…mplified pipeline stack management in `QPDFWriter`.

…ify pipeline stack management

Encapsulated pipeline stack management into a dedicated `Pl_stack` class within `QPDFWriter::Members`. Reorganized related methods to streamline and simplify initialization and activation of pipelines, removing redundant code.

Modernize QPDFWriter write methods

Add `info` logging for page processing in `qpdf_page_fuzzer`

Introduce a new `info` method for detailed logging during page processing in `qpdf_page_fuzzer`. This includes timestamps and page-specific messages to improve traceability and debugging.

…dundant normalization and string unparse logic across multiple write calls.

…ndling, leverage `std::string_view`, and streamline QDF indent logic.

… overloads, streamline QDF handling, and simplify string and trailer writes.

Fix pkg-test CI Failure on using <concepts> include file.

Modernize QPDF_encryption

…onsolidate `iterate_rc4` logic, and streamline RC4 key processing.

…arrays with `std::string`, and simplify key computation logic.

…ect `substr` calls, and simplify password handling logic.