Fix building on non-windows platforms & add workflow test targets

[D4isDAVID]

This PR aims to fix building & running on non-windows platforms.

• Declared winapi as a dependency only for windows builds.
• Moved windows-only code from the main build function to a different function.
• Declared colors::fix_ansicolor as windows-only.
• Modify Rust workflow to build & test using all current tier 1 targets.