Device agnostic overlay (custom overlay support)

[octvs]

Discussed in #22

^{Originally posted by octaskin July 10, 2023}
Hey there,
Is it possible to use SwayOSD in a similar manner to wob, passing a number (also maybe a flag to handle the icon or text describing which switch it is) letting other scripts to do the actual work?

Having a more stripped down functionality (maybe optionally) could be of interest to other users.
Many Arch users already have wrappers to drive their peripherals, at which point a tool like wob comes in handy, with a more Unix-y approach so to say, by just accepting a number to show the current level.
I like the optics of SwayOSD, but would like the extensibility of wob. I don't know how the icons are queried currently but the script can accept a flag to select from a predefined set of icons, or even can accept a icon name from installed icons, just like notify-send from libnotify.