Overlay Application Windows for Tiling WMs (Awesome)

_System Information_:

$ inxi -S
System:
  Host: ... Kernel: 6.8.0-49-generic arch: x86_64 bits: 64
  Desktop: awesome v: 4.3 Distro: Linux Mint 22 Wilma

I currently try to optimize my workflow and I am hooked with tiling wms. Currently I look into awesome, which is great out of the box, but I think there is still a lot of configuration ahead. One thing I miss, is a way to temporarily show an application window, i.e. quickly show a calculator, a note taking app, a terminal or the likes, without messing up my tiling. A bit like the [tilda](https://sourceforge.net/projects/tilda/) terminal, but more flexible. My idea is: I press a keyboard shortcut (or on a button on a bar, whatever), and a window overlays my desktop, has focus, I interact with it and when I am done it vanishes again (without closing the application, keeping it's state) and I can continue working with my original window arrangement. Beeing done could be indicated by another shortcut or (less perfect) by the window loosing focus. Currently, when I need some application like that, and it is a shell application, I open a new terminal, restore the screen session, then close it - but this always rearranges my "tiles" and I am limited to cli applications. So, what I am looking for is: * Either a way to configure awesomewm for that behavior * Another tiling wm that would support such behavior * An additional application, providing such feature * Hints for the correct terminology, enabling me to help myself