Feature: Add "Always on top" option

[slaFFik]

Similar to how it looks and works in the Ray app.
From docs:

Keep Ray on top
If you want Ray always to be on top, just toggle on the Keep on top toggle on the menubar. In our experience, this is pretty handy to make sure that Ray is always visible, event when switching applications or workspaces.

Top right corner:

Settings:

[jonathanbossenger]

Great idea, I will look into it.