Guide for preparing a repository for use with hermes

[ageorgou]

Perhaps a short tutorial in the docs covering:

• What information sources are supported (git history, CFF, ...)
• How to add those to your repository (possibly just links to existing docs like for CFF)
• Where and when to run the haggis commands

[cdboer]

related to #28, #38.

[sdruskat]

I see this as a minimal first step towards fixing #38.
This is a duplicate of #28, which I'm closing in favour of tracking here.

This comment suggests to use examples in https://github.com/hermes-hmc/examples.

[sdruskat]

This is the CI workflow that should be documented for a first tutorial on how to fully automate software publication incl. curation step with the proof of concept version of hermes:

@led02 & @poikilotherm please review for errors.