Module That Handle Database API

[threeal]

Create a new module that handle the database for threeal-bot as an API using mongoose (to handle communication with the MongoDB server), GraphQL.js (to simplify query from client), and probably Redux (to handle state management).

Currently the API hasn't been exists, but behaviors in threeal-bot are accessing and modifying the database directly using mongoose instead of using an API. Thus, when others modules want to acces or modify the database (like viewer app), it would need to do it just like what the behaviors in threeal-bot do. So, to avoid code duplication and to simplify the data query, it would be be better create an API that handle the database for threeal-bot.