### What problem does this PR solve?
Feat: Support more chunking methods #10772
This PR enables multiple chunking methods — including books, laws,
naive, one, and presentation — to be used with all existing PDF parsers
(DeepDOC, MinerU, Docling, TCADP, Plain Text, and Vision modes).
### Type of change
- [x] New Feature (non-breaking change which adds functionality)