feat: allow setting gas manager config in the config

[moldy530]

Pull Request Checklist

• Did you add new tests and confirm existing tests pass? (yarn test)
• Did you update relevant docs? (docs are found in the site folder, and guidelines for updating/adding docs can be found in the contribution guide)
• Do your commits follow the Conventional Commits standard?
• Does your PR title also follow the Conventional Commits standard?
• If you have a breaking change, is it correctly reflected in your commit message? (e.g. feat!: breaking change)
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PR-Codex overview

The focus of this PR is to enhance Alchemy's connection handling in React hooks and configuration by adding gas manager support and improving connection retrieval.

Detailed summary

• Added gasManagerConfig to Connection type in types.ts
• Implemented watchConnection and getConnection functions in actions folder
• Updated multi-chain configurations in multi-chain-config.ts
• Added useConnection hook in useConnection.ts
• Updated useSmartAccountClient hook in useSmartAccountClient.ts to include gas manager config from connection

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