ci(workflows): migrate from npm to pnpm for dependency management

Author: ryanuo

.github/workflows/ci.yml

@@ -94,11 +94,19 @@ jobs:
         with:
           fetch-depth: 2
 
-      - name: Set up Node
+      - name: Set node
         uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v3
 
-      - name: Install dependencies
-        run: npm install
+      - name: Setup
+        run: npm i -g @antfu/ni
+
+      - name: Install
+        run: nci
 
       - name: Run tests
         run: npx vitest run --coverage