Migrate CodeSandbox examples to CodeSpaces

[vitoke]

The current CodeSandbox examples are based on an old version of Rimbu since, for some reason, CodeSandbox does not know how to deal with module-based types. This is now lasting for quite a while and instead of waiting for CodeSandbox, it's probably wise to move to another alternative. I have tried StackBlitz but with similar results.

It seems that Github CodeSpaces is showing good promise to be a good alternative to offer an easy-to-use sandbox with the following characteristics:

• Quick clone an example Rimbu repository
• Good TypeScript support
• Autocomplete/IntelliSense in browser
• Ability to execute example scripts
• Ability to change code in browser

Nice to havE:

• Ability to embed examples into the documentation

If this works, the documentation also needs to be updated to remove all the references to CodeSandBox, and possibly add new references.