feat(sample-gen): yaml sample generation

[mathis-m]

Description

if content / media type matches yaml or yml it will generate stringified sample like for json
in addition to that it will proccess the json sample vis js-yaml to the final yaml sample result

Motivation and Context

Fixes #6857
Originally requested by @deltafsdevelopment in #6470 (comment)

How Has This Been Tested?

browser
Todo: cypress tests

Screenshots (if appropriate):

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]

So... while application/yaml isn't an actual media type, and that there exists multiple ways to express yaml, e.g. 'text/yaml', based on the xml implementation as precedence, we can move forward with this as a new feature.

[tim-lai]

We should add a test for media-type 'text/yaml'

[mathis-m]

@tim-lai done

[tim-lai]

@mathis-m Thanks again! This PR is now merged!