添加 新的workflow；

.github/workflows/clean.yml

@@ -0,0 +1,40 @@
+name: cleanup caches by a branch
+on:
+  pull_request:
+    types:
+      - closed
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    permissions:
+      # `actions:write` permission is required to delete caches
+      #   See also: https://docs.github.com/en/rest/actions/cache?apiVersion=2022-11-28#delete-a-github-actions-cache-for-a-repository-using-a-cache-id
+      actions: write
+      contents: read
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Cleanup
+        run: |
+          gh extension install actions/gh-actions-cache
+          
+          REPO=${{ github.repository }}
+          BRANCH=refs/pull/${{ github.event.pull_request.number }}/merge
+
+          echo "Fetching list of cache key"
+          cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH | cut -f 1 )
+
+          ## Setting this to not fail the workflow while deleting cache keys. 
+          set +e
+          echo "Deleting caches..."
+          for cacheKey in $cacheKeysForPR
+          do
+              gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
+          done
+          echo "Done"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+

.github/workflows/toolchain.yml

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+name: Build Toolchain
+
+on: 
+  # 每周一 0 点触发
+  schedule:
+    - cron: '0 0 * * 1'
+  # 手动触发
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - windows-latest
+          - windows-2019
+          - macos-latest
+          - ubuntu-latest
+        qt_ver: 
+          - 6.6.0
+
+    steps:
+      - name: Install Qt
+        uses: jurplel/install-qt-action@v3
+        with:
+          version: ${{ matrix.qt_ver }}
+          install-deps: 'true'
+          modules: 'qt5compat addons.qtnetworkauth addons.qtmultimedia addons.qtimageformats'
+          cache: 'true'
+
+      - name: Install dependencies on windows
+        if: startsWith(matrix.os, 'windows')
+        shell: bash
+        run: |
+          choco install ninja
+          ninja --version
+          cmake --version
+          vcpkg install breakpad ffmpeg[opengl,ass,bzip2,freetype,fribidi,zlib,gpl] --triplet x64-windows
+      - name: Install dependencies on macos
+        if: startsWith(matrix.os, 'macos')
+        shell: bash
+        run: |
+          brew install ninja nasm pkg-config
+          ninja --version
+          cmake --version
+          clang --version
+          vcpkg install breakpad ffmpeg[opengl,ass,bzip2,freetype,fribidi,zlib,gpl] --triplet x64-osx
+      - name: Install dependencies on ubuntu
+        if: startsWith(matrix.os, 'ubuntu')
+        shell: bash
+        run: |
+          sudo apt-get update
+          sudo apt-get install ninja-build nasm build-essential libgl1-mesa-dev
+          ninja --version
+          cmake --version
+          gcc --version
+          vcpkg install breakpad ffmpeg[opengl,ass,bzip2,freetype,fribidi,zlib,gpl] --triplet x64-linux
+
+      - name: cache vcpkg
+        uses: actions/cache/save@v3
+        with:
+          path: |
+            C:\vcpkg\installed
+            /usr/local/share/vcpkg/installed
+          key: ${{ runner.os }}-vcpkg-installed-${{ matrix.os }}-${{ github.sha }}