Cache storage key needs versioning

[stas]

Describe the bug

Wagmi uses the same key for caching across versions. This will lead to issues for users who are upgrading, particularly for those who are coming from v0.12.x and might have to revert or deal with non-even CDN propagation.

I suggest us document at least the impact the storage key can have for those who are about to upgrade.

Relevant file:
https://github.com/wevm/wagmi/blob/main/packages/core/src/createStorage.ts#L56

Consider a versioning scheme similar to WalletConnect

Link to Minimal Reproducible Example

No response

Steps To Reproduce

1. Upgrade to v1/v2 from v0.12.x
2. Use your dapp that calls useBalance()
3. Go back to pre-upgrade version

Wagmi Version

v0.12.x / v1

Viem Version

any

TypeScript Version

No response

Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Anything else?

No response