Add a search option for games using IGDB

[ghost]

Is your feature request related to a problem? Please describe.

Add a games search option to meljin - and use IGDB since their API is free with no restrictions on data licensing compared to mobygames and the like. There are multiple ways to consume the api and there is already a reference bot that does so.

Describe the solution you'd like

s!igdb <search term> brings up a card with info on the search term. Describe alternatives you've considered

Some bots offer a Steam search option, but it doesn't include console games or games only available by physical copy or through GOG/EGS/Itch/etc.

Currently the bot hosted in their server is only available there. I don't trust myself to self host the reference bot in a secure way.

Additional context

[ToxicMushroom]

Looks good, I'll add that :)