AddWikiPage adds a new wiki page with a given wikiPath.

DeleteWiki removes the actual and local copy of repository wiki.

DeleteWikiPage deletes a wiki page identified by its path.

EditWikiPage updates a wiki page identified by its wikiPath, optionally also changing wikiPath.

InitWiki initializes a wiki for repository, it does nothing when repository already has wiki.

ToWikiPageMetaData converts meta information to a WikiPageMetaData.