Documentation: explain how existing built-in types work

[guiltygyoza]

We already have 2PSet, GCounter, GSet, LWWElementSet, and PNCounter implemented under packages/crdt. Document how they work and their usage in separate READMEs.

[d-roak]

Hi @coxmars this issue is not available. Thank you so much for reaching out! Feel free to pick up on other issues

[coxmars]

Hi @coxmars this issue is not available. Thank you so much for reaching out! Feel free to pick up on other issues

Thank you for letting me know, I will apply to other issues, thank you 🫡