add forgejo action

.forgejo/workflows/build_check.yml

@@ -0,0 +1,27 @@
+name: Build Check
+on:
+  push:
+    branches: ["main"]
+
+jobs:
+  build:
+    name: Test Build
+    runs-on: node20-bookworm
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup NodeJS
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - name: Install PNPM
+        run: |
+          corepack enable
+          corepack prepare pnpm@latest --activate
+          npm i -g typescript
+      - name: Install packages
+        run: pnpm i
+      - name: TypeScript Build
+        run: tsc
+      - name: ESLint Check
+        run: pnpm run lint