Download package in manual options

### 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

If the installation of a package fails, it would be easier to use if the update options included an icon with a download function for the current version. Currently, the process involves right-clicking on the "Program", then "Package Details", and then "Download Installation File" on the right. This option should be more easily accessible if an update fails.

This screenshot is an example. Somewhere in the menu, there should be an option to download the update directly.
The blue border is symbolic: Somewhere in the menu there should be the option: "Download package"

### Describe how this improvement could help users

If updating a package fails multiple times, you can download the current installation file directly and install the software manually.