- Add tags, sender, text_quality filters to search API and Meilisearch client
- Add sender and ocr_text_length to Meilisearch filterable attributes
- Expand saved search allowed filter keys to include q, document_type, language, sender, text_quality
- Add filters panel and saved searches UI to the Search view template
- Add tests for new search filters, saved search keys, and search view elements
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>