[FEATURE REQUEST] Discover Packages – Search: Browse the search results by pressing the down or up arrow keys

### Please confirm these before moving forward

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

### Describe the new feature

- [ ] That's, after typing the query, pressing the down arrow key would select the top result, and continuing to press the down arrow key, you continue to go down the list.

- [ ] Pressing the up arrow key selects from the bottom and upwards.

Obviously, the ability to wrap around would be appreciated; If you're at the bottom entry and press the down arrow key, wrap around to the top entry of the results, and vice versa.

Once on the desired entry, press ENTER to execute.

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- [ ] Also, pressing ENTER on the selected entry in the list (i.e., app) ought to respect the option to instantly install by double-clicking;

Option off: Shows details of the selected app when pressing ENTER.
Option on: Starts installation of the selected app when pressing ENTER.

### Describe how this new feature could help users.

More effective navigation, never leaving the keyboard to manage WingetUI.