Migrate form yarn to pnpm

.github/workflows/test.yml

@@ -7,12 +7,17 @@ jobs:
     steps:
     - uses: actions/checkout@v6
       
+    - uses: pnpm/action-setup@v4
+      with:
+        version: latest
+
     - uses: actions/setup-node@v6
       with:
         node-version: 20
+        cache: 'pnpm'
 
-    - name: "yarn install"
-      run: yarn install
+    - name: "pnpm install"
+      run: pnpm install
 
-    - name: "yarn test"
-      run: yarn test
+    - name: "pnpm test"
+      run: pnpm test