fix(vercel): drop engines.pnpm; declare pnpm only via devEngines

Vercel auto-selects pnpm 9 for older projects and fails when
engines.pnpm requires >=11. Keep devEngines pnpm ^11.0.0 only,
set engines.node to 24.x, omit packageManager and installCommand.

Author: bernaferrari

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:
-          node-version: ">=24"
+          node-version: 24
           cache: pnpm
       - run: pnpm install --frozen-lockfile
       - run: pnpm build

.node-version

@@ -1 +1 @@
-v22.12.0
+24

package.json

@@ -18,8 +18,7 @@
     "typescript": "^7.0.2"
   },
   "engines": {
-    "node": ">=24",
-    "pnpm": ">=11"
+    "node": "24.x"
   },
   "devEngines": {
     "packageManager": {