Implement APIs to load most appreciated users

[recrsn]

We need an API for loading information such as "Most Appreciated Users"

See:

• https://github.com/snowflake-app/snowflake/blob/master/snowflake/controllers/index.py#L19

This is a larger part of "meta" APIs to be grouped under "/api/meta"

Acceptance criteria

Expected request:

GET /api/meta/most_appreciated_users

Expected response: Array of most appreciated users

200 OK
Content-type: application/json

 
[
	  {
		  "name": "User",
		  "designation": "Developer",
		  "teamName": "Engineering",
		  "email": "user@example.com",
		  "profilePic": "https://example.com/image.jpg",
		  "username": "user",
		  "createdAt": "2021-02-09 21:35:24+05:30"
	  },
	  {
		  "name": "User2",
		  "designation": "Developer",
		  "teamName": "Engineering",
		  "email": "user2@example.com",
		  "profilePic": "https://example.com/image2.jpg",
		  "username": "user2",
		  "createdAt": "2021-02-09 21:35:24+05:30"
	  }
]

Tasks

We already have a query to get the most appreciated users here: https://github.com/snowflake-app/snowflake/blob/master/snowflake/models/appreciation.py#L57 So, the scope of this issue is limited to creating the controller to return the data in the appropriate format.