chore: update wagmi example

[dasanra]

Overview

• Update Wagmi example to use latest version of Wagmi and Viem.
• Add a test button to create a contract interaction with Wagmi
• Cleanup yarn.lock file

[changeset-bot[bot]]

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Latest commit: 9f584b7d7a9efb008c89ea5fe15bc72988942af8

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