Add license information

[vazhnov]

Hello!

I found your project from https://hackaday.com/2021/06/11/tv-ambient-lighting-built-for-awesome-performance/

Could you please add information about the license of this repository — is it allowed to copy, change and use the code in any purpose?
It would be great to see any popular open source license.

[AndrewMohawk]

I haven't added a license, but it is free to use, copy, edit and distribute for non commercial purposes!