feat: Thumbnail and PDF for new column type (#3193)
* draft: adding pdf cell type
* draft: adding pdf functions for rows processing
* draft: detect modalities
* Rollback
* Fix dependencies
* Adding width and height
* Adding test in assets
* Adding pdf size y bytes
* Add test for get_cell_value_value
* Add more tests
* Fix test parquet and info
* FIx typo
* Update datasets library and add test for modalities
* Add e2e
* Add missing test for first-rows and filter
* Debug e2e
* Fix copy/paste bug
* Fix documents name
* Fix typo
* Address code review suggestions
* Add Pdf spec in OpenApi
