Add license information

[vazhnov]

Hello!

I found this project from https://hackaday.com/2023/03/16/taking-apart-ikeas-latest-air-quality-sensor/

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

[oleksiikutuzov]

Indeed, thanks for the notice. Added.

[vazhnov]

MIT license — great! Thank you!