[README.md] Get it on ~ store

[channel101]

Preview:

Why?

It looks good

Resource Origin:

f-droid: https://f-droid.org/docs/Badges

playstore: https://partnermarketinghub.withgoogle.com/brands/google-play/visual-identity/badge-guidelines

appstore: https://developer.apple.com/app-store/marketing/guidelines