API contract to GET /tasks (with query)

[ivinayakg]

This is to extend the ability of the GET /tasks API from the backend to also support filtering by parameters passed as queries.
The functioning would be as follows:-

1. If no query parameters passed i.e limit or offset then the response will get all the tasks there are in the database or default to a no. of documents to return.
2. If query parameters limit and offset is passed then it would return all the documents which are created after the created time of the <task_object> whose id = offset, plus would only return n no. of documents where n = limit and therefore would also work as a paginated API.

[prakashchoudhary07]

Closing this as the PR linked to this issue has been closed, as the API contracts are outdated, and new API contracts have been updated