languages: Add union field declarations to outline in C++ (#46127)
Before:
<img width="609" height="220" alt="before"
src="https://github.com/user-attachments/assets/2bc10b8c-ecc5-419b-825b-5b7c8440b89b"
/>
After:
<img width="689" height="169" alt="after"
src="https://github.com/user-attachments/assets/ff3de33e-f71c-4fe7-b1ef-df79d935667d"
/>
Release Notes:
- Fixed outline members outline issue of unions for C++
658d419afcozacod committed on 1/6/2026, 7:15:57 PM· committed by GitHubparentc2b1b9a