Add license to repo

[kimly888]

How to add a license to repo:
https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/adding-a-license-to-a-repository

Choosing the appropriate license for a project:
https://opensource.guide/legal/#which-open-source-license-is-appropriate-for-my-project

Different types of license templates on github: