6c0b7e1 introduced a new convention for CLIs defined by Doom's modules:
to namespace them under `doom +MODULE ...`. What was once 'doom
everywhere' is now 'doom +everywhere', so the docs needed correcting.
Ref: 6c0b7e1530
Application modules are complex and opinionated modules that transform Emacs
toward a specific purpose. They may have additional dependencies and should be
loaded last (but before :config modules).
9e3d99277e