decide on convention for using module within module

[juliasloan25]

choose a convention for referring to modules within other modules when calling functions, and make sure this use is consistent throughout the repo

• e.g.: use import ClimaCoupler: ModuleName when extending a function, or using ClimaCoupler.ModuleName: function1, struct2

note: check if using Module: ... allows us to use non-listed functions from module