Add An Text Size Changer Selecter

### Your use case

#### What would you like to do?
Add A Text Size Changer Selecter to change text size
And Some costomization options
#### Why would you like to do it?
For Some People we can't see Small texts or can't see properly or Screen is too big we need to make text larger so please add it we also want some costomization to the app
#### How would you like to achieve it?
Add A Apperance button in the seetings where we can select text size color background Color background wallpaper and more costomization to the app so that the app fells like our own

### Have you considered any alternatives?

_No response_

### Additional context

_No response_

### Are you willing to provide a PR?

Yes