Auto update manager from AppManager

### Please check before submitting an issue

- [X] I am using the latest version of App Manager
- [X] I have searched the issues and haven't found anything relevant
- [X] I have read the docs

### Describe a description of the new feature

Hello!
Love this app!!
A simple yet wanted feature is the ability to update the app from the app itself.
Keep up the good work!

### Describe the solution you'd like

Check latest version on startup and give the option to download new version if found.

### Describe alternatives you've considered

_No response_

### Additional context

_No response_