[webui]: add github workflow

.github/workflows/stoream-webui.yaml

@@ -0,0 +1,31 @@
+name: stoream-webui
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        node-version: [20]
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install pnpm
+      uses: pnpm/action-setup@v3
+      with:
+        version: 9
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'pnpm'
+        working-directory: ./stoream-webui
+    - name: Install dependencies
+      run: pnpm install
+      working-directory: ./stoream-webui
+    - name: Rescript build
+      run: pnpm res:build
+      working-directory: ./stoream-webui
+    - name: Rescript build
+      run: pnpm build
+      working-directory: ./stoream-webui