[IMPROVEMENT] manage pinned apps

### 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 improvement refers to an existing feature. If you want to suggest a new feature, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=new-feature&projects=&template=feature-request.yml&title=%5BFEATURE+REQUEST%5D+%28Enter+your+description+here%29).
- [x] This improvement is not a bug. If you want to report a bug, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=bug&projects=&template=bug-issue.yml&title=%5BBUG%5D+%28Enter+your+description+here%29).

### Describe the improvement

Is there some way to see or managed Winget pinned apps in Uniget? Why wouldn't this be listed in the Manage Ignored apps with a column that says how it is ignored (Uniget or Winget (or whatever package manager)? It seems like a good mechanism exists to do this without much/any UI or UX change...

Related and what continued to confuse me further: I have steam games that always show up as Unknown - if I try to ignore them they are never added to the ignore list - click the button and nothing happens.

### Describe how this improvement could help users

One place to view and manage anything that can't or won't be updated and clear communication when you try to commit an action that can't or won't occur.