Add syntax highlighting for Fish
Problem to solve
Fish is cool. We use it always instead of Bash. I want to document commands in the wiki in Fish, but its syntax is not highlighted properly:
set now (date) echo It is $now
Wiki writers that love Fish.
I imagine the markdown rendering engine in gitlab should support this language.
Permissions and Security
Shouldn't be affected.
I guess it's not needed. Writers just have to write their fish snippets with:
```fish echo Your fishy code here ```
Absolutely no idea!
What does success look like, and how can we measure that?
Success would be that fish snippet highligh properly.