ci: 👷 Add CI tests

.github/workflows/check.yml

@@ -0,0 +1,31 @@
+name: Check Types
+
+on:
+  push:
+    branches: ['*']
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: ['main']
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+
+      - name: Install NPM packages
+        run: |
+          bun install
+
+      - name: Run typechecks
+        run: |
+          bun run typecheck