feat: add Table of Contents extension to RichText editor

[siguenzaraul]

Description

Screenshots (if applicable)

[Link to Figma Design](Figma URL here)

Implementation details

[github-actions]

🔍 Visual review for your branch is published 🔍

Here are the links to:

• the Visual Review Page

• the latest build on chromatic

• the full storybook

[github-actions]

Coverage Report for packages/react

Status	Category	Percentage	Covered / Total
🔵	Lines	17.78%	18450 / 103742
🔵	Statements	17.78%	18450 / 103742
🔵	Functions	43.61%	867 / 1988
🔵	Branches	70.22%	2615 / 3724

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/react/src/experimental/RichText/CoreEditor/Extensions/index.tsx	0%	100%	100%	0%	2-32
packages/react/src/experimental/RichText/CoreEditor/Extensions/TableOfContents/index.tsx	0%	0%	0%	0%	1-27
packages/react/src/experimental/RichText/CoreEditor/Extensions/TableOfContents/TableOfContentsPopover/index.tsx	0%	0%	0%	0%	1-146
packages/react/src/experimental/RichText/NotesTextEditor/extensions.tsx	0%	0%	0%	0%	1-116
packages/react/src/experimental/RichText/NotesTextEditor/index.stories.tsx	0%	100%	100%	0%	2-497
packages/react/src/experimental/RichText/NotesTextEditor/index.tsx	0%	0%	0%	0%	1-389

Generated in workflow #8934 for commit e82722e by the Vitest Coverage Report Action

[github-actions]

size-limit report 📦

Path	Size
JS: Stable	602.24 KB (-0.02% 🔽)
JS: Experimental	975.71 KB (+0.16% 🔺)
CSS	72.04 KB (-0.15% 🔽)