document request snippets plug points

[mathis-m]

Description

Added docs for request snippets plugin

Motivation and Context

Fixes #7502

How Has This Been Tested?

not

Checklist

My PR contains...

• No code changes (src/ is unmodified: changes to documentation, CI, metadata, etc.)
• Dependency changes (any modification to dependencies in package.json)
• Bug fixes (non-breaking change which fixes an issue)
• Improvements (misc. changes to existing features)
• Features (non-breaking change which adds functionality)

My changes...

• are breaking changes to a public API (config options, System API, major UI change, etc).
• are breaking changes to a private API (Redux, component props, utility functions, etc.).
• are breaking changes to a developer API (npm script behavior changes, new dev system dependencies, etc).
• are not breaking changes.

Documentation

• My changes do not require a change to the project documentation.
• My changes require a change to the project documentation.
• If yes to above: I have updated the documentation accordingly.

Automated tests

• My changes can not or do not need to be tested.
• My changes can and should be tested by unit and/or integration tests.
• If yes to above: I have added tests to cover my changes.
• If yes to above: I have taken care to cover edge cases in my tests.
• All new and existing tests passed.

[tim-lai]

@mathis-m Thanks for the docs update! PR merged!

[andrei572]

I can't get this example to work with SwaggerUI 4.14.0. I added the example code to the initializer script in /dist. When I render index.html, the Snippets section isn't displaying. There are no errors in the console. I am able to change other configs through the script, like toggle Try It button and turn on operation IDs, but requestSnippets doesn't seem to be working. Has something changed?