Include groups in the Account Scaffold API

[Oscariremma]

In the current Account Scaffold API we can only see the members of entire super groups but to be able to create the emails for individual committee years ([email protected]) we need to be able to get the members of the individual groups.

This PR changes it so that instead of the /api/account-scaffold/v1/supergroups endpoint returning the members directly it returns a list of groups that in turn contain the members as well as details of the groups.

One note is that this changes the signature of the API meaning it is a breaking change and technically we could have considered having this new version under /api/v2... but as the API is not used in anything as of yet (except for a broken version of Goldapps) so I don't think there is any reason to keep the old one around.

Below is an example of the new structure.

[
  {
    "name": "dragit",
    "prettyName": "DragIT",
    "type": "alumni",
    "groups": [
      {
        "name": "drawit2023",
        "prettyName": "DrawIT2023",
        "members": [
          {
            "post": {
              "postId": "844067b3-e95d-4a28-a586-7388f155b8fb",
              "svText": "Kassör",
              "enText": "Treasurer",
              "emailPrefix": "kassor"
            },
            "user": {
              "email": "[email protected]",
              "cid": "shudson",
              "firstName": "Stanley",
              "lastName": "Hudson",
              "nick": "Papa Bear"
            }
          }
        ]
      }
    ],
    "useManagedAccount": false
  }
]