Migrate CI to pnpm.

Author: nedtwigg

.github/workflows/browser-extension.yml

@@ -13,18 +13,17 @@ jobs:
       - uses: actions/checkout@v5
         with:
           submodules: recursive
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10
       - uses: actions/setup-node@v5
         with:
           node-version-file: '.nvmrc'
-          cache: 'npm'
-          cache-dependency-path: package-lock.json
-      - run: npm ci --ignore-scripts
-      - run: npm install @rollup/rollup-linux-x64-gnu @esbuild/linux-x64
-      - run: npm run postinstall --workspace=gitcasso
-      - run: npm run build --workspace=overtype
-      - run: npm run biome
+          cache: 'pnpm'
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm run biome
         working-directory: browser-extension
-      - run: npm test
+      - run: pnpm test
         working-directory: browser-extension
-      - run: npm run compile
+      - run: pnpm run compile
         working-directory: browser-extension