Added stateOverride to estimateGas action

[conwayconstar]

This PR adds stateOverride to estimateGas action as discussed here https://github.com/wevm/viem/discussions/2234

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PR-Codex overview

The focus of this PR is to implement the stateOverride feature on the estimateGas action in the codebase.

Detailed summary

• Added stateOverride parameter to estimateGas action
• Updated WalletRpcSchema type in eip1193.ts
• Added stateOverride handling in estimateGas function
• Imported parseStateOverride and StateOverride types

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