Add support for caddy and fish-shell syntaxes

[gmile]

Hi! Thank you for a fantastic library! I just started using tableau (which uses mdex) for a blog, and noticed that syntax for these two languages were not available.

https://github.com/Samonitari/tree-sitter-caddy
https://github.com/ram02z/tree-sitter-fish

Would be lovely to have them supported too.

[leandrocp]

Hey @gmile I will update mdex asap to include those 2 langs. Here's how they looks like in the terminal:

[gmile]

Awesome, thank you so much!