feat: initial commit - Habo habit tracking app

- Complete MVP with Repository Pattern, SQLite storage
- Provider + ChangeNotifier state management
- Navigation 2.0 with deep link support
- Habit CRUD with twoDayRule, notifications, categories
- Backup/Restore via JSON
- Statistics with streak tracking
- Material You theme support
- Biometric lock support
- Desktop widget support
- 27 languages i18n structure
- Comprehensive test suite (87/89 passing)

assets/images/android_monochrome.svg

@@ -0,0 +1,3 @@
+<svg width="900" height="900" viewBox="0 0 900 900" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path fill-rule="evenodd" clip-rule="evenodd" d="M363 300C328.206 300 300 328.206 300 363V537C300 571.794 328.206 600 363 600H537C571.794 600 600 571.794 600 537V363C600 328.206 571.794 300 537 300H363ZM372.277 450L417.48 495.202L532.273 380.517L547.558 395.801L417.48 525.879L356.885 465.284L372.277 450Z" fill="#09BF2F"/>
+</svg>