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

[MarcoRavich]

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

Since I've 'doxed' it in the TWEAKERS page of the Opendows project, can you please add a GH-compliant license file for it ?

As you 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/saltypepper18/Windows_Tweaker)

You can easily set a standardized one through the GH's license wizard tool.

Last but not least, I invite you to join CS Discussions to share ideas about Windows tweakings.

Hope that helps/inspires !