Update what data is returned by /api/delegates/top

[asgeir-s]

Currently, a request to /api/delegates/top, for instance

GET http://localhost:3000/api/delegates/top?space=gnosis.eth&limit=100

returns

{
  "delegates": [
    [
      "0x7ef021f62E3E7975FBC21d3202C5A1F19D53bB47",
      "3856606662913366179"
    ],
    [
      "0x6cc5b30Cd0A93C1F85C7868f5F2620AB8c458190",
      "16390578317381805817"
    ],
    [
      "0xDE1e8A7E184Babd9F0E3af18f40634e9Ed6F0905",
      "12533971654468439638"
    ]
  ],
  "updateTime": 1683028849
}

Instead, it should return something like this:

{
  "delegates": [
    {
      "address": "0x7ef021f62E3E7975FBC21d3202C5A1F19D53bB47",
      "delegatedVoteWeight": 3856606662913366179,
      "numberOfDelegates": 3
    }
    ...
  ],
  "updateTime": 1683028849
}