chore: add syntax highlighting and format arrays in doc

[brnhensley]

This is just a doc formatting update. I added syntax highlighting to code examples, and aligned the comments in the arrays to make them easier to read

Description

The change is from this:

  'sentence-case', // Sentence case
  'snake-case', // snake_case
  'start-case' // Start Case

to this:

  'sentence-case', // Sentence case
  'snake-case',    // snake_case
  'start-case'     // Start Case

Motivation and Context

This makes it easier to parse the list of rules and definitions at a glance.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[escapedcat]

Thanks!