* feat: Add CSV to Markdown table converter
- Add new CsvConverter class to convert CSV files to Markdown tables\n- Support text/csv and application/csv MIME types\n- Preserve table structure with headers and data rows\n- Handle edge cases like empty cells and mismatched columns\n- Fix Azure Document Intelligence dependency handling\n- Register CsvConverter in MarkItDown class
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Thanks also to @benny123tw who submitted a very similar PR in #1171
* optional reserve base64 string in markdown _CustomMarkdownify and pptx
* add other converter para support
* fix linter
* Use *kwarg to pass keep_data_uri para.
* Add module cli vector tests
* Fixed formatting, and adjusted tests.
* Refactored tests.
* Fixed CI errors, and included misc tests.
* Omit mskanji from streaminfo test.
* Omit mskanji from no hints test.
* Log results of debugging in comments (linked to Magika issue)
* Added docs as to when to use misc tests.
