Add with-clerk example folder

[SokratisVidros]

Bug

• Related issues linked using fixes #number
• Integration tests added

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.

Documentation / Examples

• Make sure the linting passes

This PR adds with-clerk example folder

[leerob]

We're trying to move away from linking out here, because npx create-next-app -e with-clerk would not work. Closing this, but happy to review a new PR adding an example!

[SokratisVidros]

Thanks for the clarification @leerob. I will prepare a new one.