[Guideline] redesign & update

[biumiamy]

• change to v3!

• wiki page: https://github.com/C2DH/journal-of-digital-history/wiki/Guidelines2

• branch: https://github.com/C2DH/journal-of-digital-history/tree/guidelines_v2

• change header from

to this

• add respective notebooks and split the content among them

AuthorGuideline-overview.ipynb
AuthorGuideline-installation.ipynb
AuthorGuideline-write-design.ipynb
AuthorGuideline-reproducibility.ipynb
AuthorGuideline-publish.ipynb

• update Github action