Download updates through app

**Is your feature request related to a usage problem (not a bug)? Please describe.**
It would be nice to download and update the application through FreeTube itself instead of going to the website

**Describe the solution you'd like to see implemented**
Receive notification when there is an update available and download/install it through the app

**Describe alternatives you've considered**
None

**Screenshots**
None

**Additional context**
None