[docs] Create a new page to introduce the concept of slots and slotProps

[flaviendelangle]

Extracted from https://mui-org.slack.com/archives/C04U3R2V9UK/p1714135691643129?thread_ts=1714088113.295129&cid=C04U3R2V9UK

Benchmark

• Date and Time Pickers doc (should be removed once we have this shared doc page)
• Base UI doc (might be removed in the future since Base UI do not use slots)

Content

• How to define a slot
• How to pass slotProps
• How to handle TypeScript (would be nice to align on some DX here eventually)
• People should not create slots in render because it can remount the component
• How to pass props to your custom slot (using slotProps or a context)
• Links to a home page for slots on each set of components
• other?

Question

• Should this page also link to other customization topics like styleOverrides / classes management etc... Most of those topics are documented in the Material UI doc so maybe a few additional links would allow for this page to cover most of the customization spectrum.

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[github-actions]

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