add node checks as workflow

.gitea/workflows/node-checks.yml

@@ -0,0 +1,42 @@
+name: Reusable Node Checks
+
+on:
+  workflow_call:
+    inputs:
+      node_version:
+        type: string
+        default: "22"
+      install_command:
+        type: string
+        default: "npm ci"
+      typecheck_command:
+        type: string
+        default: "npm run typecheck"
+      test_command:
+        type: string
+        default: "npm test"
+      build_command:
+        type: string
+        default: "npm run build"
+
+jobs:
+  check:
+    runs-on: docker
+    container:
+      image: node:${{ inputs.node_version }}-alpine
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: ${{ inputs.install_command }}
+
+      - name: Typecheck
+        run: ${{ inputs.typecheck_command }}
+
+      - name: Run tests
+        run: ${{ inputs.test_command }}
+
+      - name: Build
+        run: ${{ inputs.build_command }}