Forward more parameters to user and dependencies

[gracicot]

In the package manager code, CMAKE_PREFIX_PATH and CMAKE_MODULE_PATH have a special treatment. They are forwarded to the project and are forwarded to users too.

However, there's also CMAKE_FRAMEWORK_PATH and CMAKE_APPBUNDLE_PATH that are useful on mac.

Then, we have <PackageName>_DIR that could also be forwarded, which is useful when we want to force a path for a dependency.