synchronous partial state update Interface

[Juyeong-Byeon]

Summary

just like described below link there is no synchronous partial state update Interface in valtio https://github.com/pmndrs/valtio/discussions/699

So there is some limits. for achieve the goal to use batched updates for some parts of the state while still having the ability to perform synchronous updates for other parts.

Link to reproduction

https://codesandbox.io/s/valtio-sandbox-forked-ij76sz?file=/src/App.js

Check List

• [x] I've already opened a discussion before opening this issue, or already discussed in other media.

Please include a minimal reproduction.

• [x] I've added a link to a typescript playground or codesandbox with a minimal reproduction.

[dai-shi]

Let's re-open when we have some ideas in #699.