Add CI job for checking generated fourslash tests (#1227)

Author: gabritto

.github/workflows/ci.yml

@@ -236,6 +236,8 @@ jobs:
         with:
           submodules: true
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: '>=22.16.0'
       - uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable
       - uses: ./.github/actions/setup-go
         with:
@@ -248,6 +250,12 @@ jobs:
       - run: node ./internal/lsp/lsproto/_generate/fetchModel.mjs
       - run: node ./internal/lsp/lsproto/_generate/generate.mjs
 
+      - name: Remove all converted fourslash tests
+        run: rm -rf internal/fourslash/tests/gen
+
+      - name: Regenerate fourslash tests
+        run: npm run convertfourslash
+
       - run: git add .
       - run: git diff --staged --exit-code --stat