Add zsh script syntax highlight support

[Antibioticss]

Problem description

There's no zsh syntax option in latest ST4. No related packages too.

If I use bash instead, it gets very strange, like this:

I hope there will be an update to this. I appreciate it.

Preferred solution

Add zsh syntax support.

Alternatives

A package is also helpful.

Additional Information

No response

[deathaxe]

Related with #1358, #2635, #2638.