Perhaps make a shadow folder for unit tweaks overlay

[sprunk]

Consider having a folder for unit "tweakdefs" files, such that a modder can just put cloakraid.lua in some folder and have it work as a tweak (i.e. be overlaid on top of the gameside file).

Perhaps this already exists in a way since mapside units/*.lua is read, overrides gameside, and can be made to be a "tweak" (i.e. overlay on top of gameside) via VFS.Include, but maybe involving function call API is more scary to complete beginners (who I expect are going to be a large part of the audience for this) than just dumping a nicely formatted copypaste of a vanilla unitdef somewhere.