[Feature] Support sol outputting to a file

[kayabaNerve]

Component

sol! macro

Describe the feature you would like

As ethers-contract allowed, alloy-contract should allow outputting the generated code to a file to allow manual inspection.

This allows anyone curious about how their specific contract had code generated (exact function API/type signatures) trivially inspect it, and can make the sol macro functionality a one-time dependency (to output to code once) or solely a build-time dependency.

Additional context

No response