Add cxyz Android project structure and initial configuration

- Introduced a new Flutter project for the cxyz Android manga/comic reader, including essential files such as pubspec.yaml, AndroidManifest.xml, and Gradle configuration.
- Added .gitignore files to exclude unnecessary files and directories for both the main project and Android-specific files.
- Implemented initial README.md with project description, features, setup instructions, and API details for ComicLand, MangaRead, and MangaTown.
- Configured analysis options and dependencies in pubspec.yaml to support Flutter development.
- Established a pnpm workspace and lockfile for dependency management.
- Included various Android resources such as icons, styles, and launch backgrounds for a complete application setup.

cxyz-android/test/reader_zoom_test.dart

@@ -0,0 +1,16 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:cxyz_android/services/reader_zoom.dart';
+
+void main() {
+  test('clamp stays in range and snaps to step', () {
+    expect(ReaderZoom.clamp(0.1), ReaderZoom.min);
+    expect(ReaderZoom.clamp(3.0), ReaderZoom.max);
+    expect(ReaderZoom.clamp(0.66), closeTo(0.7, 0.001));
+    expect(ReaderZoom.clamp(1.0), 1.0);
+  });
+
+  test('percentLabel formats', () {
+    expect(ReaderZoom.percentLabel(0.7), '70%');
+    expect(ReaderZoom.percentLabel(1.0), '100%');
+  });
+}