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/lib/services/reader_direction.dart

@@ -0,0 +1,39 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+/// Vertical continuous scroll vs horizontal page turns.
+enum ReaderMode {
+  webtoon,
+  paged;
+
+  String get storageValue => this == ReaderMode.paged ? 'paged' : 'webtoon';
+
+  static ReaderMode fromStorage(String? raw) {
+    return raw == 'paged' ? ReaderMode.paged : ReaderMode.webtoon;
+  }
+}
+
+/// Global / per-title paged-reader tap/swipe direction.
+enum ReadingDirection {
+  ltr,
+  rtl;
+
+  String get storageValue => name;
+
+  static ReadingDirection fromStorage(String? raw) {
+    return raw == 'rtl' ? ReadingDirection.rtl : ReadingDirection.ltr;
+  }
+}
+
+class ReaderDirection {
+  static const prefKey = 'reader_reading_direction';
+
+  static Future<ReadingDirection> load() async {
+    final prefs = await SharedPreferences.getInstance();
+    return ReadingDirection.fromStorage(prefs.getString(prefKey));
+  }
+
+  static Future<void> save(ReadingDirection direction) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(prefKey, direction.storageValue);
+  }
+}