Create new service that can communicate with IGDB

[victorwrotethis]

The next step to integrating IGDB game information is to create services related to calling that api. The first one is using the external game endpoint. Using the following syntax you can retrieve the IGDB id for Fortnite using the twitch version of the game id.

fields game,name;
where uid = "33214" & category = 14; 

• [x] Create new IGDB package containing a IGDBAPI service (or perhaps a better name) that is used to perform requests
• [x] Create IGDBGameService that performs the detailed calls through the previous API service
• [x] Add method to call external_game to match the twitch game-id with the IGDB one.
• [x] Add method to call game to retrieve the summary and url.
• [x] Create enums for the IGDB endpoints
• [x] Create an enum for the allowed fields used per igdb endpoint. Meaning only summary and url at this point for the game

[PS2emu]

I can easily milk 3 more PR's from this one issue :P