Setup codesandbox examples

[hartzis]

Move/relocate/repackages all examples into a new codesandbox setup so each example is it's own codesandbox that people can fork to iterate from.

Similar to use-gesture's setup 😸

• https://github.com/pmndrs/use-gesture/tree/main/demo/src/sandboxes
• https://github.com/pmndrs/use-gesture/tree/main/.codesandbox