add pull-request github action

Author: Kagashino

.github/workflows/pull-request.yml

@@ -0,0 +1,63 @@
+name: Pull Request Checking
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  worktree_clean_checking:
+    name: workspace checking
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v2
+      - name: Unshallow clone for tags
+        run: git fetch --prune --unshallow --tags
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.goversion }}
+      - name: Install pulumictl
+        uses: jaxxstorm/action-install-gh-release@v1.5.0
+        with:
+          repo: pulumi/pulumictl
+      - name: Install Pulumi CLI
+        uses: pulumi/action-install-pulumi-cli@v2.0.0
+      - name: Setup Node
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{matrix.nodeversion}}
+      - name: Setup DotNet
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: ${{matrix.dotnetverson}}
+      - name: Setup Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{matrix.pythonversion}}
+      - name: Build SDK
+        run: make build_${{ matrix.language }}
+      - name: Check worktree clean
+        run: |
+          git update-index -q --refresh
+          if ! git diff-files --quiet; then
+              >&2 echo "error: working tree is not clean, aborting!"
+              git status
+              git diff
+              exit 1
+          fi
+    strategy:
+      fail-fast: true
+      matrix:
+        dotnetversion:
+          - 3.1.301
+        goversion:
+          - 1.19.x
+        language:
+          - nodejs
+          - python
+          - dotnet
+          - go
+        nodeversion:
+          - 14.x
+        pythonversion:
+          - "3.9"