Improve Environment Setup Documentation

[shaik-noor]

Description

The project lacks clear documentation or scripts for ensuring the correct environment setup, specifically regarding the Rust toolchain.

Issues Observed

• Users may find cargo or rustc missing from their path even if installed.
• Lack of clarity on required VS C++ Build Tools for Windows.

Goal

• Add a "Prerequisites" section to README.
• Add checks in build scripts to verify cargo availability and provide helpful errors.