Provide the information about pagination in API responses

[oscar60310]

What’s the problem you're trying to solve

We've implemented offset-based pagination #104, but our API response didn't give extra information about it, e.g. total count.

Describe the solution you’d like

We can wrap our result to "results" property, and add extra information about pagination like below:

{
    "_links": {
        "next": "/api/users?limit=20&offset=20",
    },
    "offset": 0
    "limit": 20,
    "results": [
        // Data gose here
    ],
    "total_count": 100,
}

Additional context