[FEATURES REQUEST] add pinning functionality

[JE-Amouel]

Hi,

Is your feature request related to a problem? Please describe.
I find that pano's content preview has become so necessary for productivity that I sometimes use it as a cheat paper,
but I find that I often have to trigger the content preview all the time to have access to it,

and it's especially a little disturbing all the time to have to click on it to paste several contents.

Describe the solution you'd like
so here is my suggestion is, if possible, add a pin button
which will prevent the content preview from closing with each action, and also at the same time dbus commands to do it from a terminal, such as for example:
busctl --user call org.gnome.Shell /io/elhan/Pano io.elhan.Pano pin # pin pano window
busctl --user call org.gnome.Shell /io/elhan/Pano io.elhan.Pano unoin # unpin pano window

Describe alternatives you've considered
N\A

Additional context
this image, is a screenshot of my desktop, and i just use Krita to add that Pin icon.