[Other] Add release upload to Zenodo for DOI registration and CITATION.cff file

[Luna-Klatzer]

Is there an existing issue for this?

• I have searched the existing issues

Current State & Issue

Considering Kipper is a partially scientific project (coming from HTL Leonding and likely soon working with the JKU in Linz) adding a CITATION.cff file would help allow other people to cite the project as well as properly understand who worked when on the project in a more formal way than with standard repository info.

Alongside this using Zenodo would also be rather beneficial to officially allow the project to get a DOI, which can distinguish it from other projects and help it gain more credibility.

Proposed Changes

• Add a new CITATION.cff file based on the format given here https://citation-file-format.github.io/
• Set up Zenodo release upload to allow for version-specific DOI assignment
• Add Zenodo DOI badge for the latest release to the README.md files of every sub-project.

[Luna-Klatzer]

Added by #504 and the CITATION.cff file will be in the repo starting with version v0.10.4.