* Fix mermaid chart size
Seems like one of the recent updates to the module unexpectedly shrunk
these charts, bring them back up to full width.
* don't stretch to full width
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
- Add loading spinners on editor and mermaid renderers
- Add error handling and inline error box for mermaid
- Fix Mermaid rendering by using the .init api