* feat(lang): Complete French and Canadian French translations
- Added 91 missing French translation keys to main-fr.json
- Updated Canadian French (main-fr-CA.json) with complete translation coverage
- Applied authentic Canadian French terminology (réunion vs conférence, É.-U. vs États-Unis)
- Removed 44 legacy keys from Canadian French to match English/French structure
- All files now have identical key coverage (1,469 keys each)
- Maintains regional linguistic preferences while ensuring 100% feature coverage