* refactor(scripts): simplify run.sh script
a lot of the contents of run.sh is either wrong, unnecessary, or both! a program runner-script that installs software on your PC is a terrible idea, since users themselves should make such decisions, not some random installer/runner scripts from a github repo. the overfixation on python3.8 makes this script practically entirely useless on any linux system that isn't based on debian, or is based on debian but is heavily modified. on archlinux this script is useless, it wont install anything for you and it wont find python3.8 since there's no such thing as python3.8 ANYWHERE except for a few distros where older versions of software are not stored in an archive, but rather in the packages repo
* refactor(scripts): apply a lot more of refactoring of run script
* fix(scripts): remove env variable setting for macOS systems
use --pycmd python instead of --pycmd python3
* chore(structure): rename requirements files
all of the requirements under `requirements/` have requirements-* in their name, which just looks dirty since all of the requirements are already in the `requirements` dir. therefore to have cleaner project, it's better to rename all the req files to just contain info on what each of them does
* fix(unitest): update requirements file used in the unitest workflow
