C++ module support

[bnagababu]

Environment

• OS and Version: Windows 11
• VS Code Version: 1.93.1
• C/C++ Extension Version: 1.3.0
• If using SSH remote, specify OS of remote machine:

Bug Summary and Steps to Reproduce

Bug Summary: C++ module support

Steps to reproduce:

1. set C++ standard to c23 in cmake
   2.write import std; in source code
2. IntelliSense showing import std; as error

Expected behavior:
IntelliSense support for C++ modules

Configuration and Logs

dont know

Other Extensions

No response

Additional context

import std;

int main(){
std::cout << "Hi Modules\n";
}

This code is compiling and running fine using cmake 2.30.
But IntelliSense showing error at """import std;"""

[sean-mcmanus]

I assume you mean c++23 and not c23. We're already tracking this with #6302.