Async effect with Send+Copy set_state!

[namse]

Changes

1. All state must impl Send.
2. Sig<State> is now Copy and Send.
3. SetState is now Copy and Send.
4. New hook, async_effect
   • https://github.com/NamseEnt/namseent/pull/882/files#diff-69b55583ed1898bd273726bdb75b352c67a120c6ce0244f6b0dfef0a8526f98bR615-R625
   • To avoid let state = state.clone() code, I choose react style dependency expression.
5. Creating namui_hooks::World will make a memory leak because it make a static reference of std::sync::mpsc::Sender. Most of case it would be OK.