[Feature] Markdown support in album/share description

[LnLcFlx]

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request.

• Yes

The feature

Has been mentioned in #1643.
This allows for better explanation of the images in an album.
Also this would allow for having links in the description, e.g. to another related album.

Platform

• Server
• Web
• Mobile

[bo0tzz]

#18868