Wiki mermaid milestones
Adds command milestone-wiki
and refactors/improves related changelog_wiki
Wikipages for Release notes
and Milestones
are now moved from wiki-root to subpages.
Subpages revealed this bug https://github.com/python-gitlab/python-gitlab/pull/1080, but is worked around.
From help:
Usage: nagger milestone-wiki [OPTIONS] [MILESTONE]
Generate milestone to wiki. Indented list and a Mermaid diagram
MILESTONE is primary Agile and in second hand Group.
closes #1 (closed)