Markdown in descriptions

[dejanbelusic]

Update the feature to render markdown in the field description.

In the fields of type object and type boolean, markdown will be rendered in the description when enableMarkdownInDescription is set to true.

Issue reporting this bug: #3975
Previous PR to add the feature: #3665

The result:

Checklist

• I'm updating documentation
  • I've checked the rendering of the Markdown text I've added
• I'm adding or updating code
  • I've added and/or updated tests. I've run npx nx run-many --target=build --exclude=@rjsf/docs && npm run test:update to update snapshots, if needed.
  • I've updated docs if needed
  • I've updated the changelog with a description of the PR
• I'm adding a new feature
  • I've updated the playground with an example use of the feature