ci: cache npm dependencies (#184)

Author: tombl

.github/workflows/build.yml

@@ -23,6 +23,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 24
+          cache: npm
       - run: npm ci
       - run: npm run build --workspaces --if-present
       - run: rm -rf node_modules

.github/workflows/check.yml

@@ -9,6 +9,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 24
+          cache: npm
       - run: npm install
       - run: npm run build
       - run: npm run check --workspaces --if-present

.github/workflows/size.yml

@@ -13,6 +13,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 24
+          cache: npm
       - uses: preactjs/compressed-size-action@v2
         with:
           compression: brotli

.github/workflows/test.yml

@@ -12,6 +12,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 24
+          cache: npm
       - run: npm ci
       - run: npm run build
       - name: Disable AppArmor for chromium