Feat: more keyboard support

[cmsax]

• Arrow key to navigate through hits
  (I misunderstood the left avatar and add a setting item to hide it 😅. It was designed to be an indicator)

[UseTheFork]

ha! It's not a big deal I think it actually works well since I do think we should add Favicons in that spot in combination with the selection arrow. The Linkding API doesn't currently send it over but I want to pull that project down and update the API to pass that over.