Add EIP-5792 sendCalls support

[ricmoo]

Describe the Feature

The EIP-5792 standard allows multiple operations to be completed in a single RPC call, optionally allowing for atomic batches and additional capabilities.

For now, a separate class (in an experimental branch and NPM tag) will be used to try out some various API options.

This issue stems from #4916 and will be used to track progress, feedback and suggestions.

Code Example

[fredokruger]

Thank you very much. We’ll be waiting for the methods to be added to the signer. MetaMask is one of the main wallets, so I believe it’s essential