Sort Action Reference document

[KaitoMuraoka]

I find it difficult to locate the Action Reference in the document, so I think it would be better to sort it alphabetically.
If it's alright, I’d like to take charge of it.

Expectations

Users can search in alphabetical order.

[BrandonRomano]

The reference pages are auto-generated (just saying this out loud so you don't manually sort these!).

I believe it might be this:
https://github.com/ghostty-org/ghostty/blob/35b9ceee2116331b83c0c86269394e2545070b0f/build.zig#L1651-L1654