ci: add test running to speakeasy workflow

Author: mattapperson

.github/workflows/speakeasy_run_on_pr.yaml

@@ -30,6 +30,18 @@ jobs:
       - name: Run Speakeasy
         run: speakeasy run
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run tests
+        run: npm test
+
       - name: Commit changes
         run: |
           git config --global user.name 'github-actions[bot]'