[IMPROVEMENT] Run package via context menu / package details

### 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/Devolutions/UniGetUI/issues/new?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/Devolutions/UniGetUI/issues/new?labels=bug&projects=&template=bug-issue.yml&title=%5BBUG%5D+%28Enter+your+description+here%29).

### Describe the improvement

I'd like a way to run a updated / installed package via UniGetUI.

For example via the right-click in the Installed Packages tab, via package details popup windows, and via the operations list's "..." menu.

### Describe how this improvement could help users

Sometimes it's unclear where a package has been installed to or Windows' Start Menu doesn't cache the new program immediately so finding it can be a challenge. A way to launch the program from UniGetUI would be a way to get it running in such cases.

Start by tracing the Installed Packages tab, package details popup windows, and the operations list's "..." menu to understand how package actions are exposed. Confirm how an updated or installed package's executable location is available, then make the launch action consistent across those entry points and verify it works when Start Menu discovery is delayed.

Written by the indexing model from the issue text.