Add support for creator package

[terryl1900]

Hello, Creator is a state management package I recently released. It is inspired by rivperpod.

Currently, I'm copying all the source code to make DartPad work (example), and I would like to request native DartPad support.

Not sure what is the criteria here. I guess my package is still too early? Anyway, creating this issue to track.

[iamshaunwu]

+1

[mukhtharcm]

+1

[johnpryan]

Closed in #995

[domesticmouse]

Actually, this isn't shipped to production, so I'm re-opening this issue. This package has been shipped to our hidden testing instance https://dartpad.dev/?channel=dev

Please exercise your suggested package on this instance and confirm here that it works as intended. If you do confirm this as working I'll ship it to stable, beta, master, and old channels on dartpad.dev. If you don't confirm, I won't ship it.

[terryl1900]

Hi @domesticmouse I confirm it works on the testing instance. Thank you!

[domesticmouse]

Thank you @terryl1900!