feature(motion): Storybook variable documentation

[ckrook]

Describe pull-request

This PR adds documentation for motion transition & animation variables in Storybook.
This PR also renames the motion variables to better align with Figma Design system naming.

Issue Linking:

• Jira: CDEP-3777

How to test

Provide detailed steps for testing, including any necessary setup.

1. Go to AWS Storybook link
2. In the left sidebar, navigate to category "Motion".
3. Inspect both the Transition & Animation folder and make sure no odd behavior here.

Charlotte will review the actual animations from a design point of view.

Checklist before submission

• I have added unit tests for my changes (if applicable)
• All existing tests pass
• I have updated the documentation (if applicable)
• Not breaking production behavior
• Behavior available in storybook with documented descriptions (if applicable)
• npm run build-all without errors

Suggested test steps

• Browser testing (Chrome, Safari, Firefox)
• Keyboard operability
• Interactive elements have labels.
• Storybook controls
• Design/controls/props is aligned with other components
• Dark/light mode and variants
• Input fields – values should be displayed properly
• Events

Additional context

I have renamed the motion variables so I would consider this PR a minor breaking change

[aws-amplify-eu-north-1]

This pull request is automatically being deployed by Amplify Hosting (learn more).

Access this pull request here: https://pr-966.d3fazya28914g3.amplifyapp.com

[github-actions]

Playwright test results

 420 passed
 1 skipped

Details

 421 tests across 146 suites
 1 minute, 10 seconds
 8b8fbe0

Skipped tests

src/components/table/table/test/expandable-row-autocollapse/expandable-row-autocollapse.e2e.ts › tds-table-expandable-row-autoCollapse › NEEDS FIXING: expanding one row collapses the others when autoCollapse is true

[theJohnnyMe]

@ckrook please do this:
1 . Rebase PR with latest develop on local so we do not see other code but only your changes
2. Check that "STORYBOOK_ENV" variable is inactive, now _beta components made their way in the code

[Lunkan89]

I believe the .darwin screenshots can be removed since there generated for local test run?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[theJohnnyMe]

Nice improvements and Storybook docs!