remove unused files, add rofiworld_loader file

src/common/CMakeLists.txt

src/common/include/common/frame.hpp

src/common/src/frame.cpp

src/edit/include/edit/editor.hpp

src/edit/src/editor.cpp

src/filein/CMakeLists.txt

src/filein/include/filein/module_loader.hpp

src/filein/include/filein/rofiworld_loader.hpp

src/filein/src/cubemap_splitter.py

src/filein/src/module_loader.cpp

src/filein/src/rofiworld_loader.cpp