ci: use GitHub Package Registry for testing

Configure test workflows to install @voidzero-dev/global from GitHub
Package Registry using secrets.VP_TOKEN for authentication.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: fengmk2

.github/workflows/test.yml

@@ -24,6 +24,8 @@ jobs:
         uses: ./
         with:
           version: latest
+          registry: github
+          github-token: ${{ secrets.VP_TOKEN }}
           cache: false
 
       - name: Verify installation
@@ -50,6 +52,8 @@ jobs:
         uses: ./
         id: setup
         with:
+          registry: github
+          github-token: ${{ secrets.VP_TOKEN }}
           cache: true
           cache-dependency-path: pnpm-lock.yaml