feat: rtl for tables

[artem-harbour]

Linear: SD-2810

Phase 5 (RTL Table Stability) is now completed for RTL table interaction and roundtrip reliability.

This PR does not introduce RTL tables from scratch; core support was already in place.
The main work here was stabilization and regression coverage:

• Confirmed full bidiVisual pipeline behavior (<w:bidiVisual/> ↔ tableProperties.rightToLeft)
• Validated RTL table rendering order and border behavior in the current layout pipeline
• Verified click-to-position behavior for RTL tables, including empty/padding areas
• Verified Tab and Shift+Tab table navigation behavior against Word
• Confirmed export roundtrip preserves RTL table semantics without border-side corruption
• Fixed RTL resize/drag boundary mapping issues, including handle-to-column targeting and post-resize hover indicator consistency
• Added regression tests for RTL and LTR table resize/hover flows
• Added focused behavior and import/export tests using real DOCX fixtures

Overall result: RTL tables are now covered by explicit tests across rendering, interaction, and export paths, with resize/drag behavior stabilized and regression-protected.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[linear]

SD-2810