chore: clean up repository and improve gitignore

- Remove generated documentation files from tracking
- Remove Flutter build artifacts
- Add comprehensive gitignore patterns for

Author: Ivanmw97

.gitignore

@@ -49,4 +49,17 @@ build/
 captures/
 .externalNativeBuild
 .cxx
-local.properties
+local.properties
+
+# Flutter/Dart specific
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+pubspec.lock
+*.g.dart
+
+# Generated documentation (regenerated by CI)
+docs/api/