IThirdwebWallet.Transfer Optional ERC20 Override

[0xFirekeeper]

An alternative to ERC20_Transfer that might make more sense to some people.

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PR-Codex overview

This PR introduces a new test for transferring ERC20 tokens and modifies the Transfer method to handle both native tokens and ERC20 tokens based on an optional tokenAddress parameter.

Detailed summary

• Added a new test method TransferERC20Override in Thirdweb.Extensions.Tests.cs.
• Updated XML documentation for the Transfer method to describe ERC20 token transfer.
• Modified the Transfer method to accept an optional tokenAddress parameter.
• Implemented logic to transfer ERC20 tokens if tokenAddress is provided.

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

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  Hits            ?     3414           
  Misses          ?      786           
  Partials        ?      163           

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