[Docs] Add C++ pybind11 compilation & troubleshooting guide

[Asmit-Singh-01]

📄 Documentation Request

Compiling the C++ engine via pybind11 can sometimes fail on different operating systems if C++ compilers (GCC/Clang/MSVC) or headers are missing. We need a quick troubleshooting guide added to the documentation.

🎯 Target File

• README.md (or a dedicated docs/BUILD_TROUBLESHOOTING.md)

🛠️ Tasks

• Document C++ compiler requirements for Linux (gcc), macOS (clang), and Windows (MSVC).
• Add troubleshooting steps for common pybind11 missing header or path issues.
• Verify the make build-engine workflow is clearly explained.

🚀 Beginner Friendly

Great issue if you enjoy writing clear developer guides and documentation!

[Jahnavi-Patel-C]

Hi! I'd love to take this up and create the troubleshooting guide. Could you please assign this to me?