ci: created github actions workflow for automatically formatting, linting, and type checking

.github/workflows/main.yml

@@ -0,0 +1,41 @@
+name: Lint
+
+on:
+  push:
+    branches: ["*"]
+  pull_request:
+    branches: ["*"]
+
+jobs:
+  lint:
+    name: Lint, Type Check & Format
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v3
+        with:
+          version: 9
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Run format
+        run: pnpm format
+
+      - name: Run lint (Prettier + ESLint)
+        run: pnpm lint
+
+      - name: Run type check
+        run: pnpm check
+        env: 
+          GOOGLE_GENERATIVE_AI_API_KEY: ${{ secrets.GOOGLE_GENERATIVE_AI_API_KEY }}