This way we can define flags to control the cubes
automatically. Then we can just call cubes inside
of each other and control the behavior via flags.
if :no-flag set to true then the cube won't be needing
a flag to get activated.
I've added some cubes including 'selectrum', 'company'
'lsp', 'smart-mode-line', 'mini-modline' and several
others which allows me to switch to v3 and continue
from there. Some of the cubes are not in the right place
but will move them to an appropriate location later on