[REQ] add a (GH-compliant) license file

[MarcoRavich]

Hi there, 1st of all thanks for your awesome work !

Since we've "doxed" it in our HyMPS project (under the AUDIO section \ AI-based page \ Drums), can you please add a "GH-compliant" license file ?

Expliciting licensing terms is extremely important to let other devs (and not only) understand how to reuse/adapt/modify your code in other open projects and vice-versa.

As you certainly know, expliciting licensing terms is extremely important to let anyone better/faster understand how to reuse/adapt/modify sources (and not only) in other open projects and vice-versa.

Although it may sounds like a minor aspect, license file omission obviously causes an inconsistent generation of the relative badge too:

(badge-generator URL: https://badgen.net/github/license/pagrumiaux/drums_transcription/)

Anyway you can easily choose a "correct" one through the GH's license wizard tool.

Last but not least, let us know how - in your opinion - we could improve categorization/sorting of collected projects in order to push their evolution by favouring collaborations between developers (and not only).

Thanks in advance.

[MarcoRavich]

Bump (request updated).