c/cpp: MSVC COM interface keyword misparsed as function instead of struct

[timxx]

Description

MSVC COM headers use #define interface struct to alias the COM interface keyword. When tree-sitter-cpp encounters a definition like:

interface IMyComInterface : IParentInterface {
    virtual void Foo() = 0;
    virtual void Bar() = 0;
};

The parser reads interface as the declaration's return type and IMyComInterface as the declarator — the whole class vanishes from the graph and IMyComInterface surfaces as a phantom function node instead of a struct:

codegraph query IMyComInterface
→ function    IMyComInterface
  include/sdk/com/MyInterface.h:42

We'd expected IMyComInterface is a struct kind