fix: handle create_dir_all errors in sol macro generation

[0xtutankhamun]

Motivation

The sol_macro_gen.rs file had two instances where fs::create_dir_all() results were being ignored using let _ =, which could silently hide directory creation failures during binding generation.

Solution

Replaced ignored fs::create_dir_all() calls with proper error handling using the ? operator in write_to_crate() and write_to_module() methods.

This ensures directory creation failures are properly reported instead of being silently ignored.

PR Checklist

• Added Tests
• Added Documentation
• Breaking changes