Add caching to prevent 429 errors

.github/workflows/mkdocs-ci.yml

@@ -23,11 +23,18 @@ jobs:
         with:
           python-version: 3.x
       - uses: actions/setup-node@v4
+      - name: Cache Node.js modules
+        uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+      - run: |
+          npm ci || npm ci --retry=3 --delay=5
       - run: |
-          npm i
-          npm i -g ts-node
           cd builder
-          mkdir dist dist/plugins dist/themes
+          mkdir -p dist dist/plugins dist/themes
           ts-node build.ts
           cp dist/plugins/* ../docs/plugins/list.md
           cp dist/themes/* ../docs/themes/list.md