Add CI workflow

.github/workflows/main.yml

@@ -0,0 +1,34 @@
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: npm
+
+      - uses: actions/checkout@v4
+        with:
+          repository: modelcontextprotocol/typescript-sdk
+          ssh-key: ${{ secrets.TYPESCRIPT_SDK_KEY }}
+          path: packages/@modelcontextprotocol/sdk
+
+      - run: npm ci
+        working-directory: packages/@modelcontextprotocol/sdk
+
+      - run: npm pack
+        working-directory: packages/@modelcontextprotocol/sdk
+
+      - run: npm install --save packages/@modelcontextprotocol/sdk/modelcontextprotocol-sdk-*.tgz
+      - run: npm ci
+      - run: npm run build