Improved tables; links and references

Table improvements

• Tables now handle colspans and rowspans properly
• Improved table model with better accuracy
• Tables merge across pages if you pass --use_llm
• New table benchmarks

Links and references

• Links and references are now pulled out of the pdf, and are clickable
• Anchors are placed on elements as targets

Better configuration

• Any configuration option can now be passed on the CLI

Misc

• With --use_llm, handwriting is now recognized (if the layout detects it)
• Better llm mode overall

What's Changed

• Dynamic option parsing and updated documentation by @iammosespaulr in #457
• Add context manager support for PdfProvider by @tarun-menta in #481
• Table benchmarks by @tarun-menta in #480
• PDF Link and References Support by @iammosespaulr in #474
• Improved References by @iammosespaulr in #491
• New table model by @VikParuchuri in #472
• Vik dev by @VikParuchuri in #497
• OCR Error Detection Hotfix by @tarun-menta in #498
• Vik dev by @VikParuchuri in #500
• Dev by @VikParuchuri in #499
• Table improvements by @VikParuchuri in #503

Full Changelog: v1.2.7...v1.3.0