feat: rtl for lists

[artem-harbour]

Linear: SD-2932

• Implemented Phase 4 RTL list fixes in the layout pipeline:
  • Added logical indent normalization in pm-adapter (start/end -> physical sides) and applied RTL mirroring via mirrorIndentForRtl().
  • Fixed RTL list marker anchoring/nesting behavior in rendering paths (including deeper ordered levels).
• Refactored duplicated marker-indent math:
  • Introduced shared helper resolveMarkerIndent() in shared/common/list-marker-utils.ts.
  • Reused it in both legacy painter path (renderer.ts) and resolved path (resolveParagraph.ts).
• Added/extended RTL list behavior coverage:
  • Nested RTL list visual levels.
  • Tab/Shift+Tab level changes in RTL lists.
  • ArrowLeft/ArrowRight and Shift+Arrow selection behavior inside RTL list lines.
• Cleanup:
  • Removed dead ensureBidiIndentPx helper and related public export/tests noise.
• Documentation/plan updates:
  • Marked changeListLevel inline-indent deletion as non-blocking for validated RTL list scenarios.
  • Marked ParagraphNodeView marker-path item as out of scope for user-facing rendering (DomPainter is the visual path).

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[linear]

SD-2932 Phase 3 — RTL List Support

[artem-harbour]

New PR
#3187