Accessibility behavior tests and documentation generation

[kolaps33]

Pull request checklist

• Include a change request file using $ yarn change

Open questions/Future work

• invoke click and keyboard event with testing libary - https://github.com/testing-library/user-event > can be implement in future after agreement inside the team
• where should be "[behaviorName]Definition" files stored? so far the definition file is in the same folder where is "behavior" file
• currently generating documentation from "behavior" file and from "definition" exists together.
  If documentation is not found in behavior file, then is generated from "definition" file. In the future generating doc from behavior file need to be removed.

Description of changes

This PR is coming out from the @mnajdova PR.
#14797

Purpose of the PR is to test "behavior" files and generate documentation from each behavior file based on the test.

In this PR following behaviors are tested:

• buttonBehavior
• buttonGroupBehavior
• toggleButtonBehavior

This behaviors are now cover by test which stpes are in the "[behaviorName]Definition" file.

From "[behaviorName]Definition" file is as well documentation for each behavior file generated.

It doesn't change the documentation, only content under "description" paragraph is coming from "[behaviorName]Definition" file (pl. see screenshot below):

Focus areas to test

(optional)

[ecraig12345]

I think the build failure is because you need to add an alias in a tsconfig somewhere for @fluentui/a11y-testing since it's not within packages/fluentui. Try adding this under compilerOptions.paths in packages/fluentui/react-northstar/tsconfig.json: "@fluentui/a11y-testing": ["packages/a11y-testing/src"] (and if that doesn't work I'd recommend asking Shift or Miro if they can help figure out where to add it)