ci(add-lint-typescript): Add CI workflow

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: Python check
+name: CI check
 
 on:
   pull_request:
@@ -86,3 +86,39 @@ jobs:
               git --no-pager diff
               exit 1
             fi
+
+jobs:
+  lint-typecheck-build:
+    name: Lint, Type Check & Build
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: functions
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+          cache-dependency-path: functions/pnpm-lock.yaml
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+          run_install: false
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Run ESLint
+        run: pnpm lint
+
+      - name: Run TypeScript type check
+        run: pnpm typecheck
+
+      - name: Run build
+        run: pnpm build