First draft for automatic AUR PKGBUILD generation

[kpj]

Closes #86.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[utkuozdemir]

Thanks for the PR, I'll try to have a look soon. Regarding your question about the SSH key, I will set a new GH actions secret for that. Unfortunately secrets are not populated on PR runs from forks, will need to see how we handle that - probably I'll review, merge your PR and then make another myself to take care of the SSH/secrets part.