chore: Add dependencies section to README.md

README.md

@@ -12,6 +12,15 @@ one tool, making it possible to use as interface for other tools like window man
 - Supports for relative increase/decreases
 - Designed to be fast
 
+## Dependencies
+
+**lumactl** doesn't have any build time dependency, other than a working Rust compiler and
+toolchain. At runtime, it uses [_wmctl_](https://github.com/danyspin97/wmctl) to get the current
+available displays, if the display argument hasn't been passed to it. _wmctl_ currently only
+supports Wayland, but **lumactl** works with any display as long as you hard-code its name (i.e.
+`DP-4`, `eDP-1` or `HDMI-A-1`, refer to your current window manager documentation on how
+to get the mentioned information).
+
 ## Getting started
 
 To build **lumactl** local, run: