Storybook: Add story for Editable Text component

[Rishit30G]

Part of #67165

What?

This PR adds storybook for Editable Text component

Testing Instructions

• Run npm run storybook:dev
• Open Storybook at http://localhost:50240/
• Verify the DuotoneControl story is present and functioning

Screenshots or screencast

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[t-hamano]

Thanks for working on this issue.

#68291 has already been submitted, so let's move forward with that PR.