feat: add shell action input

.github/workflows/test.yml

@@ -132,3 +132,16 @@ jobs:
           build-args: --target test_c --target test_cpp
           run-test: true
           test-args: -R test
+
+  specified-shell:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v3.5.3
+
+      - name: Use the action with specified shell
+        uses: ./
+        with:
+          shell: bash
+          source-dir: test
+          run-build: true