[CMake] Adding unused files to the generated project

[Lucas Soltic]

Hello,

Is it possible to add files that do not belong to any add_executable/library so that they're visible in the IDE but not used for building?
That way I could easily work with the generated project on any useful file, even if it's not directly used to produce binaries (for example, editing CMakeLists.txt from the IDE).

Regards,
Lucas