Initial commit: CookIT recipe collection and week planner

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

l10n.yaml

@@ -0,0 +1,6 @@
+arb-dir: lib/src/localization
+template-arb-file: app_de.arb
+output-localization-file: app_localizations.dart
+output-dir: lib/src/localization
+synthetic-package: false
+nullable-getter: false