Support local build, support ffmpeg for windows, linux, macos, android

.github/workflows/coverage.yaml

@@ -0,0 +1,45 @@
+name: coverage
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  windows:
+    name: windows
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: robinraju/[email protected]
+        with:
+          repository: "rainyl/opencv_dart"
+          tag: "dnn_test_files"
+          fileName: "models.zip"
+          out-file-path: "packages/dartcv/test/"
+          extract: true
+      - uses: robinraju/[email protected]
+        with:
+          repository: "rainyl/dartcv"
+          latest: true
+          fileName: "libdartcv-windows-x64-vs2019.tar.gz"
+          out-file-path: "packages/dartcv/libdartcv"
+          extract: true
+      - uses: subosito/flutter-action@v2
+        with:
+          channel: "stable"
+      - name: test coverage
+        run: |
+          cd "${{github.workspace}}\packages\dartcv"
+          $env:PATH="${{github.workspace}}\packages\dartcv\libdartcv\lib;$env:PATH"
+          dart pub global activate coverage
+          dart pub global run coverage:test_with_coverage --package . --package-name dartcv
+      - name: Upload to Codecov
+        uses: codecov/[email protected]
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: rainyl/opencv_dart
+          file: ./coverage/lcov.info