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.

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

…page label processing logic, centralize label handling, and adjust related resource management.

…ges` sets with vector<bool> `Input::copied_pages`, centralize page tracking logic, adjust page processing, and simplify resource management.

…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.

…gic in `handlePageSpecs` and `new_selection`, and simplify page processing.

…alize handling in `Files::process_all`, and simplify `handlePageSpecs`.

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

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

…, replace redundant file warning logic in `handlePageSpecs`, and simplify resource management.

…zation, simplify `handlePageSpecs` and `new_section`, and streamline file processing logic.

…ce removal handling, and cleanup redundant code in `handlePageSpecs`.

…sing, and simplify page specification handling.

…date page handling logic in `Input`, and optimize page range processing.

…ing logic, and streamline password handling and verbose output.

…ine file handling and resource management logic.

…page_heap` and `page_spec_qpdfs`, simplify file handling, and improve code clarity.

…ange handling, and cleanup obsolete logic.

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

…ors for `Members` and `ProgressReporter`

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