Add live reloading for config.toml

[thepragmaticmero]

A competing compositor has this function~. When the user modifies the config file, it automatically reloads. It doesn't slow down the computer at all, I have it on my purposefully slow machine (N2840 processor) and it works amazingly, I usually compare live reloading to CHAD: Gnome live-reloading config CUCK: KDE Apply button for everything.

This has the potential to improve the UX significantly for new users. Editing text files to change configurations has always been tedious; that's part of why newbs look at tiling window managers as being exclusively for experts. Adding this feature would be a huge improvement.