feat: added summary, candidate, and scanner command under project command.

[Mehul-Kumar-27]

This pull request enhances the project command by introducing new commands for better project management.
@Vad1mo Sir, it would be great if you could review it.

• summary command helps the user to get the summary of a project using the project name or the project ID.

./harbor project summary testproject1
{
  "project_admin_count": 1,
  "quota": {
    "hard": {
      "storage": -1
    },
    "used": {
      "storage": 0
    }
  },
  "repo_count": 0
}

• candidate command helps to retrieve the system configured scanner registrations as candidates of setting project level scanner.

./harbor project candidate testproject1
{
  "Link": "",
  "XTotalCount": 1,
  "Payload": [
    {
      "access_credential": "",
      "auth": "",
      "create_time": "2024-05-15T05:00:20.222Z",
      "description": "The Trivy scanner adapter",
      "disabled": false,
      "is_default": true,
      "name": "Trivy",
      "skip_certVerify": false,
      "update_time": "2024-05-15T05:00:20.222Z",
      "url": "http://trivy-adapter:8080",
      "use_internal_addr": true,
      "uuid": "07748217-1278-11ef-98f2-0242c0a8a009"
    }
  ]
}

• scanner command helps to get the scanner registration of the specified project.

./harbor project scanner testproject1
{
  "access_credential": "",
  "adapter": "Trivy",
  "auth": "",
  "create_time": "2024-05-15T05:00:20.222Z",
  "description": "The Trivy scanner adapter",
  "disabled": false,
  "health": "healthy",
  "is_default": true,
  "name": "Trivy",
  "skip_certVerify": false,
  "update_time": "2024-05-15T05:00:20.222Z",
  "url": "http://trivy-adapter:8080",
  "use_internal_addr": true,
  "uuid": "07748217-1278-11ef-98f2-0242c0a8a009",
  "vendor": "Aqua Security",
  "version": "v0.47.0"
}