[FEATURE REQUEST] Option to relocate/rename/delete apps' Start Menu shortcuts

### Please confirm these before moving forward.

- [x] I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
- [x] This proposal is a completely new feature. If you want to suggest an improvement or an enhancement, please use [this template](https://github.com/Devolutions/UniGetUI/issues/new?labels=enhancement&projects=&template=enhancement-improvement.yml&title=%5BENHANCEMENT%5D+%28Enter+your+description+here%29).

### Describe the new feature

You can organize where your app is installed in some pacakge managers (e.g., winget) by passing a custom flag.
However, you can't organize where app shortcuts are created. UniGetUI partially helps here by allowing you to delete Desktop shortcuts, but you still can't mange those created in the Start menu.

So I'd like to add a custom option per app to define the Start menu path where its shortcuts should be moved to after the install
This could also extend the current "delete desktop shortcuts" functionality - you'd be able to delete various "visit my app's website" shortcuts that you never visit

This represents and additional challenge for uninstalling because UniGet would need to store the list of relocated shortcuts per app and delete them. But even without this cleanup the functionality would be useful

### Describe how this new feature could help users

Avoid the disorganized mess of app shortcuts in the Start Menu