monitors.lua picks the main external (Studio Display, else the Samsung
S34CG50 ultrawide, matched on EDID) and reloads the config when it changes.
Workspaces 1-4, the Wacom mapping, and its active-area aspect follow it.
eDP-1 uses auto-right so it sits beside whichever external is connected.
Also unbinds SUPER+RETURN / SUPER+SHIFT+RETURN (terminal and browser live
on SUPER+CTRL+ALT+J/K) and pins the Fastmail/Beeper scratch workspaces'
comments to eDP-1.
Prad Nukala