ci(WHE-19): add quality gate workflow for main and PRs (#2)

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  quality:
+    name: Quality Gates
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: 1.3.10
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Check formatting
+        run: bun run format:check
+
+      - name: Lint
+        run: bun run lint
+
+      - name: Typecheck
+        run: bun run typecheck
+
+      - name: Test
+        run: bun run test
+
+      - name: Build
+        run: bun run build