Rebrand from MyCrib to Casera

- Rename Kotlin package from com.example.mycrib to com.example.casera
- Update Android app name, namespace, and application ID
- Update iOS bundle identifiers and project settings
- Rename iOS directories (MyCribTests -> CaseraTests, etc.)
- Update deep link schemes from mycrib:// to casera://
- Update app group identifiers
- Update subscription product IDs
- Update all UI strings and branding

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

composeApp/src/androidMain/res/values/strings.xml

@@ -1,4 +1,4 @@
 <resources>
-    <string name="app_name">MyCrib</string>
-    <string name="default_notification_channel_id">mycrib_notifications</string>
+    <string name="app_name">Casera</string>
+    <string name="default_notification_channel_id">casera_notifications</string>
 </resources>