Add GitHub Actions CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: 1.3.3
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Run type check
+        run: bunx tsc --noEmit
+
+      - name: Build application
+        run: bun build src/index.tsx --outfile dist/loki --target bun
+
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: loki-binary
+          path: dist/loki