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/mangatown_catalog_test.dart

@@ -0,0 +1,33 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:cxyz_android/sources/mangatown/mangatown_source.dart';
+import 'package:cxyz_android/sources/source.dart';
+
+@Tags(['network'])
+void main() {
+  test(
+    'latest pagination: offset 0 and 30 yield different first slugs',
+    () async {
+      final source = MangaTownSource();
+      final first = await source.loadCatalog(
+        CatalogMenuKind.latest,
+        offset: 0,
+        limit: 30,
+      );
+      final second = await source.loadCatalog(
+        CatalogMenuKind.latest,
+        offset: 30,
+        limit: 30,
+      );
+      expect(first, isNotEmpty);
+      expect(second, isNotEmpty);
+      expect(first.first.slug, isNot(second.first.slug));
+      final firstSlugs = first.map((c) => c.slug).toSet();
+      expect(
+        second.any((c) => firstSlugs.contains(c.slug)),
+        isFalse,
+        reason: 'page 2 should not overlap page 1',
+      );
+    },
+    timeout: const Timeout(Duration(seconds: 90)),
+  );
+}