Plugin system

[artalar]

It would be great to have a plugin system that allows for global modification of base atoms and actions. This is necessary because sometimes changes need to be applied to library atoms and actions as well, which is impossible to archive by own instance of atom and action.

Cases:

• Built-in bindings to Svelte, Angular, and some React
• Adding an additional rollback parameter for an atom update
• Transparently adding the domain name to the Reatom entities
• Adding "reset state on disconnect" logic by default
• Log created atoms in devtools