Feature Request: Add Intel/NASM Syntax Option for Inline Assembly

Hello GCC Team,

The inline assembly keyword (__asm__) currently uses AT&T syntax. However,
many developers (including myself) are more familiar with Intel/NASM
syntax, especially when developing operating systems and low-level code.

Would it be possible to add support for Intel syntax in inline assembly?
For example:
- Keep the existing __asm__ keyword with AT&T syntax for compatibility
- Add a new keyword like __asm_intel__ or __asmnasm__ for Intel/NASM syntax
- Or add a syntax flag/attribute to switch between syntaxes

This would greatly help OS developers who primarily use NASM for their .asm
files and want consistent syntax when using inline assembly in C code.

I'm currently developing CoolisOS (an x86-64 operating system) and this
feature would make the codebase more maintainable.

Thank you for considering this request!