ci: add GitHub Actions CI pipeline with lint, type-check, and test jobs

Author: Seaual

.github/workflows/ci.yml

@@ -0,0 +1,114 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+          cache: "pip"
+
+      - name: Install backend dependencies
+        run: pip install -r requirements.txt
+
+      - name: Ruff check
+        run: ruff check .
+
+      - name: Ruff format
+        run: ruff format --check
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install frontend dependencies
+        working-directory: frontend
+        run: npm install
+
+      - name: ESLint
+        working-directory: frontend
+        run: npm run lint
+
+      - name: Prettier
+        working-directory: frontend
+        run: npm run format
+
+  type-check:
+    name: Type Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+          cache: "pip"
+
+      - name: Install backend dependencies
+        run: pip install -r requirements.txt
+
+      - name: Pyright
+        run: pyright backend/ mkg/
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install frontend dependencies
+        working-directory: frontend
+        run: npm install
+
+      - name: TypeScript check
+        working-directory: frontend
+        run: npm run typecheck
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+          cache: "pip"
+
+      - name: Install backend dependencies
+        run: pip install -r requirements.txt
+
+      - name: Run backend tests
+        run: pytest tests/ -v
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install frontend dependencies
+        working-directory: frontend
+        run: npm install
+
+      - name: Run frontend tests
+        working-directory: frontend
+        run: npx vitest run