deprecate devstore

[dai-shi]

This deprecates "devstore" which was available in dev environment.
It's primarily provided for the devtools library, and now they can create their own devstore using the jotai internals. They have more control, for example it can be provided in production environment.

Once jotai-devtools migrates to the new way, we will remove the deprecated devstore in a minor release.

@arjunvegda See tests/vanilla/storedev.test.tsx that has the devstore impl to keep the current "rev4" devstore in the library.

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Size Change: +413 B (+0.42%)

Total Size: 97.8 kB

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