feat: Table inline editing polish

[snowystinger]

Closes

A few remaining items that I realised I'd forgotten

Adds a background colour to hovered cells.
Adds new docs example
Remove unused onCancel prop

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

🧢 Your Project:

[snowystinger]

how do i debug the PropTable.tsx component? I can't tell why placement is being added to an Overlay group in the table

Also, noticed that I cannot see the bottom of the TOC unless I scroll to the bottom of the page

[snowystinger]

still need to solve this issue

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the documentation
• View the S2 docs

[rspbot]

## API Changes

@react-spectrum/s2

/@react-spectrum/s2:EditableCell

 EditableCell {
   align?: 'start' | 'center' | 'end' = 'start'
   children: ReactNode
   className?: ClassNameOrFunction<CellRenderProps> = 'react-aria-Cell'
   colSpan?: number
   id?: Key
   isSaving?: boolean
-  onCancel: () => void
   onSubmit: () => void
   renderEditing: () => ReactNode
   showDivider?: boolean
   style?: StyleOrFunction<CellRenderProps>
 }

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