Add an endpoint for profile page data

[Fursum]

Current endpoints arent enough to construct the profile page. Connected to this issue: https://github.com/boraarslan/mapper-influence/issues/65

Needed fields:

• boolean for if the user has already added this person

  can use the cookie to get the requesting user, can be a separate endpoint

• influence data
  • influence array of:

    - influenced user  ->  same with get_user data
    - influence strength
    - influence description
    - example maps  ->  should have the function to pull map info

  • mentions array of:

    - connected user  ->  same with get_user data
    - boolean if the user entered a description

• map count info

  graved, pending, ranked etc. maps

• user bio

  moved from get_user to this endpoint

• featured maps

  area under bio in which the user can showcase their maps, this can either be just the map id or map information such as song metadata and difficulty name

This is the information needed to fill the profile page. Reference design: