Add pages project settings API

What does this MR do and why?

Add pages project settings API

Add /api/v4/projects/root%2Fhtml/pages to return some basic pages settings information for the given project:

{
  "url": "http://html-root-4160ce5f0e9a6c90ccb02755b7fc80f5a2a09ffbb1976cf80b653.pages.gdk.test:3010",
  "deployments": [
    {
      "created_at": "2024-01-05T18:58:14.916Z",
      "url": "http://html-root-4160ce5f0e9a6c90ccb02755b7fc80f5a2a09ffbb1976cf80b653.pages.gdk.test:3010/",
      "path_prefix": "",
      "root_directory": null
    },
    {
      "created_at": "2024-01-05T18:58:46.042Z",
      "url": "http://html-root-4160ce5f0e9a6c90ccb02755b7fc80f5a2a09ffbb1976cf80b653.pages.gdk.test:3010/mr3",
      "path_prefix": "mr3",
      "root_directory": null
    }
  ],
  "is_unique_domain_enabled": true,
  "force_https": false
}

This will help users to manage pages via API.

Related to: #436932 (closed)

Changelog: added

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