🚧 Implemented FuzzyWuzzy as search engine, allowing typos in !docs command [postponed]

[burdoto]

NOTE: This version of FuzzyWuzzy is under GPL License, but this will change in Version 2.0.0, which is currently WIP.
If this is requested, I can change this PR to 2.0.0 as soon as it is released.

[Vampire]

I thought xdrop/fuzzywuzzy#44 is necessary for this?
Anyway, as long as it is releasing under GPL, this cannot work, we would infringing their copyright unless we release the bot under GPL too which it is not currenlty.
So as long as they don't release a version with a licence compatible with ASL, this PR cannot be accepted and then also only with that version.

[burdoto]

Yes, # 44 was intended for this particular use.
We are currently working on getting non-gpl algorithms to fuzzywuzzy and plan on completing this around Jan19.
This pr can be left open and I will change it as soon as there is a non-gpl usable variant.