Currently, in many KUD setup scripts, there is performed configuration, that is fine for newly created machine, but may be dangerous to use on already existing host (e.g. removing id_rsa key of running user). It also covers some applications and/or plugins being installed without prior checking if it's necessary (e.g. package is already installed).

Scope of this task is to refactor some installations script so that `aio.sh` could be run on already existing machine taking advantage of some steps already done where possible and not messing up existing configuration