OpenSystemsDevelopment / qpdf

…ted tests, documentation, and references across the codebase.

Enhance the `global` namespace by introducing `limit_errors` for tracking the number of exceeded limits. Update related tests and documentation to ensure functionality and clarity.

…pport for configurable global limits via `qpdf_global_get_uint32` and `qpdf_global_set_uint32`.

…ntation, and update references in `FormField` methods.

Simplify integer value retrieval by introducing a templated `value` method in the `Integer` class. Replace redundant exception handling logic across multiple functions with this unified approach. Streamline type conversions and improve readability.