Synchronise kaos release tag with cli and backend version

[WiktorJ]

What is the desired change?

The tag in github and dockerhub should be synchronised with versions in cli/setup.py and backend/steup.py.

How will this change improve kaos?

Clear versioning schema.

Any thoughts on the implementation approach?

One possible approach is to extend the github action to not only tag the git repository but also bump the version for steup.py files.

[github-actions]

Thanks for supporting the development of kaos with your first issue! We look forward to handling it.

[WiktorJ]

A good idea would be to create VERSION file in the project root and use this in all setup.py in the project.

[WiktorJ]

Current Approach:

• New github action which will be triggered on pull request [open, reopen, synchronize, label, unlabel]. This action takes VERSION file from master and updates the version according to label of PR (#major, #minor, or none which means #path) and commits this file to the PR branch.

• The action that is currently responsible for tagging have to be changed to just take the version from VERSION file instead of calculating it from previous tag.