Adding heading to TOC

[benazeer-ben]

What?

Fixes : #52378

Why?

There is no good way of setting a title for the Table of Contents block

How?

Added settings to include title for the Table of Content block.

Testing Instructions

• Open a post or page.
• Insert a heading block.
• Check the settings added to include title for the block.
• Verify the title is displaying properly in editor and frontend.

Screenshots or screencast

Before	After

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Co-authored-by: benazeer-ben <[email protected]>
Co-authored-by: afercia <[email protected]>
Co-authored-by: Mamaduka <[email protected]>
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