Project rename: hera-workflows -> hera

[sambhav]

Hey everyone, we are excited to announce that Hera Workflows has, officially, rebranded to Hera! Hera initially supported only Argo Workflows. Now that it supports Events starting with v5, rebranding to purely Hera was a natural next step :) As Hera evolves we plan to expand support for Events, add CD, and Rollouts!

Technical notes:

• the package will be available on PyPI under both hera and hera-workflows (previous maintainers of a package called “hera” were incredibly kind to hand off the name to us) for the forseeable future from v5 onwards. Older versions of hera will only be available under hera-workflows
• no forks are affected, GitHub handles the redirect for us
• contributors are not affected, it’s not required to reclone the project