Oxygen UI framework stabilization and documentation improvement

[johannnallathamby]

Is your suggestion related to a experience ? Please describe.

We've been using Oxygen UI in Console & My Account for a while now and we've identified several areas that we can improve to make it more stable and adoptable.

This umbrella issue will track the identified areas.

Describe the improvement

• Figma Stabilization

  • Assets
    • Icons
      • Introduce a script to generate a list of icons and a manifest that can be exported to the Figma board oxygen-ui#270

• @oxygen-ui/react Stabilisation

  • Ditch defaultProps since it'll be deprecated in the future oxygen-ui#277
  • Some components don't forward refs oxygen-ui#276
  • Remove empty .scss files to avoid unnecessary style sheet embeds oxygen-ui#275
  • Change CSS class naming convention to PascalCase to align with MUI oxygen-ui#274
  • Align the default color palette and styling to WSO2 styleguide oxygen-ui#259
  • Migrate the project build to be identical with MUI's build oxygen-ui#290
    • Testing library is unable to render some Oxygen UI components oxygen-ui#218
  • Storybook
    • Bump Storybook version to v8 oxygen-ui#52
    • Migrate away from mdx stories to CSF format oxygen-ui#291

Additional context

N/A