Added FAQs for common errors

[WillisMedwell]

I'm new to this library so some documentation around common errors like:

"message(FATAL_ERROR "A module (${name}) failed to define its name!")" from CPM.cmake L1246

would be great... e.g
"CPM_AddModule(
"glaze"
GIT_REPOSITORY "https://github.com/stephenberry/glaze"
GIT_TAG "v2.5.2"
)" and the actual glm repo both seem to have this error...