Enable minimum CI for Windows bazel build

As a preparation to support Bazel for Windows build (#948), we start
enabling an experimental CI rule for Windows bazel build.

#codehealth

PiperOrigin-RevId: 646330047

.github/workflows/windows.yaml

@@ -74,6 +74,57 @@ jobs:
           path: src/out_win/Release/Mozc64.msi
           if-no-files-found: warn
 
+  build_bazel:
+    # https://github.com/actions/runner-images/blob/main/images/windows/Windows2022-Readme.md
+    runs-on: windows-2022
+    timeout-minutes: 120
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+
+      - name: Set up pip
+        shell: cmd
+        working-directory: .\src
+        run: |
+          python -m pip install six requests
+
+      - name: Try to restore update_deps cache
+        uses: actions/cache@v4
+        with:
+          path: src/third_party_cache
+          key: update_deps-${{ runner.os }}-${{ hashFiles('src/build_tools/update_deps.py') }}
+
+      - name: Install Dependencies
+        shell: cmd
+        working-directory: .\src
+        # This command uses src/third_party_cache as the download cache.
+        run: |
+          python build_tools/update_deps.py
+
+      - name: Biuld Qt
+        shell: cmd
+        working-directory: .\src
+        run: |
+          python build_tools/build_qt.py --release --confirm_license
+
+      # This is needed only for GitHub Actions where free disk space is quite limited.
+      - name: Delete Qt src to save disk space
+        shell: cmd
+        working-directory: .\src
+        run: |
+          rmdir third_party\qt_src /s /q
+
+      - name: build artifacts
+        shell: cmd
+        working-directory: .\src
+        env:
+          ANDROID_NDK_HOME: ""
+        run: |
+          bazel --bazelrc=windows.bazelrc build //win32/installer:artifacts --config oss_windows --verbose_failures --cpu=x64_windows
+
   test:
     # https://github.com/actions/runner-images/blob/main/images/windows/Windows2022-Readme.md
     runs-on: windows-2022