feat: Add build-print feature to enable logging in build.rs scripts

[elcoosp]

This PR introduces a new optional build-print feature, allowing users to capture and display logs generated during build.rs execution.

Changes

• Adds build-print as an optional dependency, conditionally enabling it via the Cargo feature flag.

• Updates logging macros (debug!, trace!) to route output through build-print when the feature is active, ensuring logs appear during build scripts.

• Maintains backward compatibility by falling back to standard log crate behavior when build-print is not enabled.

Usage

Enable the feature in your Cargo.toml:

[dependencies.rust_cmd_lib]
features = ["build-print"]

This is particularly useful for debugging build-time logic or tracking output from custom build.rs workflows.