[C/C++] look like the C/C++ not support __asm / _asm / asm

ST doesn't ship with any assambler syntax, which could be embedded into C/C++.
To support that, such a syntax would need to be added first.
Another question then was, which assembler dialect to support. Assuming C/C++ to be used on all available platforms, it would mean to support x86 / x64 / arm / riscv and probably more.
@deathaxe, maybe we can just highlight _asm and __asm and everything enclosed into {} after that
ST doesn't ship with any assambler syntax, which could be embedded into C/C++.
To support that, such a syntax would need to be added first.
Another question then was, which assembler dialect to support. Assuming C/C++ to be used on all available platforms, it would mean to support x86 / x64 / arm / riscv and probably more.
I mean this does not support inline assembly syntax highlighting,not just __asm _asm asm