docs: Add tuple enum JS client documentation

[acheroncrypto]

Problem

Unnamed(tuple) enum variant JS client interactions is not documented.

Summary of Changes

• Add JS example for different enum variants; unit, named, unnamed(tuple)
• Fix code alignment of the code snippets
• Fix incorrect type in the Struct example

[vercel]

@acheroncrypto is attempting to deploy a commit to the coral-xyz Team on Vercel.

A member of the Team first needs to authorize it.