feat: tambah MCP server deploy-stg untuk trigger GitHub workflow

- scripts/mcp-deploy.ts: MCP server dengan 2 tool:
  - publish: trigger publish.yml (build & push image stg)
  - repull: trigger re-pull.yml (redeploy stack di Portainer)
- .mcp.json: registrasi server dengan env GH_TOKEN, STACK_NAME, BASE_URL

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -32,6 +32,7 @@
     "@mantine/hooks": "^8.3.18",
     "@mantine/modals": "^8.3.18",
     "@mantine/notifications": "^8.3.18",
+    "@modelcontextprotocol/sdk": "^1.29.0",
     "@prisma/client": "6",
     "@tanstack/react-query": "^5.95.2",
     "@tanstack/react-router": "^1.168.10",