* removed first-header-extractor
get first heading from markdown rende
* don't remove editor or renderer just hide them
this way both are always up to date and can be shown very fast
* extracted image alt attribute into first title. too
* added tests as suggested by @mrdrogdrog
* Added yaml-frontmatter extracting and error handling
* add tests
* changed document-title, so the editor can change the title to the title of the yaml metadata. closes#303
* extracted first line parsing in a core rule of markdown-it
document title will now be determined like this:
1. yaml metadata title
2. opengraph title
3. first level one heading
4. 'Untitled'
* added documentTitle e2e test
Co-authored-by: Erik Michelson <github@erik.michelson.eu>
Co-authored-by: Philip Molares <philip@mauricedoepke.de>
Co-authored-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>
Co-authored-by: mrdrogdrog <mr.drogdrog@gmail.com>
