ci(pulumigo): add path-based trigger filter to build workflow

- Only trigger build on changes to main.go, cmd/, internal/, go.mod, go.sum
- Included .github/workflows/build-pulumigo.yml to allow workflow self-updates
- Schedule and manual dispatch remain available

.github/workflows/build-pulumigo.yml

@@ -0,0 +1,88 @@
+name: Build and Release PulumiGo CLI
+
+on:
+  pull_request:
+    paths:
+      - 'PulumiGo/main.go'
+      - 'PulumiGo/go.mod'
+      - 'PulumiGo/go.sum'
+      - 'PulumiGo/cmd/**'
+      - 'PulumiGo/internal/**'
+      - '.github/workflows/build-pulumigo.yml'
+  push:
+    paths:
+      - 'PulumiGo/main.go'
+      - 'PulumiGo/go.mod'
+      - 'PulumiGo/go.sum'
+      - 'PulumiGo/cmd/**'
+      - 'PulumiGo/internal/**'
+      - '.github/workflows/build-pulumigo.yml'
+  schedule:
+    - cron: '0 2 * * *'  # 每天 UTC 凌晨 2 点
+  workflow_dispatch:
+
+jobs:
+  build-and-test:
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
+        arch: [amd64, arm64]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+
+      - name: Build PulumiGo binary
+        run: |
+          mkdir -p dist
+          GOARCH=${{ matrix.arch }} GOOS=linux go build -o dist/PulumiGo-${{ matrix.os }}-${{ matrix.arch }} main.go
+
+      - name: Compress binary
+        run: |
+          cd dist
+          tar -czvf PulumiGo-${{ matrix.os }}-${{ matrix.arch }}.tar.gz PulumiGo-${{ matrix.os }}-${{ matrix.arch }}
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: pulumigo-${{ matrix.os }}-${{ matrix.arch }}
+          path: dist/PulumiGo-${{ matrix.os }}-${{ matrix.arch }}.tar.gz
+
+      - name: Run CLI --help test
+        run: |
+          cd dist
+          tar -xzvf PulumiGo-${{ matrix.os }}-${{ matrix.arch }}.tar.gz
+          chmod +x PulumiGo-${{ matrix.os }}-${{ matrix.arch }}
+          ./PulumiGo-${{ matrix.os }}-${{ matrix.arch }} --help
+
+  publish-release:
+    needs: build-and-test
+    runs-on: ubuntu-latest
+    env:
+      tag_name: daily-${{ github.run_id }}
+      release_name: Daily Build PulumiGo - ${{ github.run_number }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: release-artifacts
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: ${{ env.tag_name }}
+          name: ${{ env.release_name }}
+          prerelease: true
+          files: release-artifacts/**/*.tar.gz
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+