Add iOS launch screen and app icon assets

- Created new app icon images for various sizes and added them to the asset catalog.
- Added launch images for different resolutions (1x, 2x, 3x) in the asset catalog.
- Updated the LaunchScreen storyboard to use the new launch images.
- Created a README for the launch image assets directory.
- Updated Info.plist to reference the new launch storyboard.
- Added a bridging header for Swift compatibility.
- Created initial test file for Runner application.
- Initialized project structure with necessary files and configurations.

android/.gitignore

@@ -0,0 +1,14 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+.cxx/
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/to/reference-keystore
+key.properties
+**/*.keystore
+**/*.jks