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/scripts/build_apk.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+# Build cxyz Android APK and copy to a SOURCES-tagged filename.
+#
+# Usage:
+#   ./scripts/build_apk.sh
+#   ./scripts/build_apk.sh mangaread
+#   ./scripts/build_apk.sh all
+#   ./scripts/build_apk.sh comicland,mangaread,mangatown
+#   ./scripts/build_apk.sh mangaread --debug
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT"
+
+SOURCES="${1:-comicland}"
+MODE="release"
+if [[ "${2:-}" == "--debug" ]] || [[ "${1:-}" == "--debug" ]]; then
+  MODE="debug"
+  if [[ "${1:-}" == "--debug" ]]; then
+    SOURCES="comicland"
+  fi
+fi
+
+# Normalize tag for filename: comicland,mangaread → comicland-mangaread
+SOURCES_TAG="$(echo "$SOURCES" | tr '[:upper:]' '[:lower:]' | tr ',' '-' | tr -cd 'a-z0-9-')"
+if [[ -z "$SOURCES_TAG" ]]; then
+  SOURCES_TAG="comicland"
+  SOURCES="comicland"
+fi
+
+REPO_ROOT="$(cd "$ROOT/.." && pwd)"
+export PATH="${REPO_ROOT}/.tools/bin:${REPO_ROOT}/.tools/flutter-sdk/bin:${PATH:-}"
+export CI=true BOT=true
+
+echo "Building APK (SOURCES=${SOURCES}, mode=${MODE})…"
+
+BUILD_ARGS=(build apk --dart-define="SOURCES=${SOURCES}")
+if [[ "$MODE" == "debug" ]]; then
+  BUILD_ARGS+=(--debug)
+fi
+
+flutter "${BUILD_ARGS[@]}"
+
+SRC_APK="build/app/outputs/flutter-apk/app-${MODE}.apk"
+OUT_NAME="cxyz-${SOURCES_TAG}-${MODE}.apk"
+OUT_APK="build/app/outputs/flutter-apk/${OUT_NAME}"
+
+if [[ ! -f "$SRC_APK" ]]; then
+  echo "error: expected APK missing: $SRC_APK" >&2
+  exit 1
+fi
+
+cp -f "$SRC_APK" "$OUT_APK"
+
+echo
+echo "APK: ${ROOT}/${OUT_APK}"
+echo "     (also ${SRC_APK})"