fix: accessibility relationships in MorphingDialog

[illia1f]

Description

This PR fixes broken accessibility references in the MorphingDialog component. The aria-labelledby and aria-describedby attributes on the main dialog container were referencing IDs that either did not exist or did not match the child components.

Related Issue

Closes #168

Changes

• MorphingDialogTitle: Added the missing id attribute (motion-ui-morphing-dialog-title-${uniqueId}).
• MorphingDialogDescription:
  • Updated the id to match the expected format (motion-ui-morphing-dialog-description-${uniqueId}).
  • Removed an unnecessary key prop.

Impact

• Assistive technologies will now correctly associate the dialog with its title and description, ensuring compliant accessibility behavior.

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