Current tree sitter configuration for the outline was not working
correctly since the rule required a strict order, firstly
storage_class_specifier then type_qualifier. This resulted in a failure
to recognize types such as "constexpr int", "const double", etc. This PR
proposes a solution with diagnostic capture of type and storage
qualifiers which ensures full context capture and works well with C++.


Before:
<img width="924" height="365" alt="before"
src="https://github.com/user-attachments/assets/d4e0baab-b074-42fc-8a45-46c93d1d352b"
/>

After:
<img width="866" height="367" alt="after"
src="https://github.com/user-attachments/assets/0e69a4d8-fd91-44b3-bc7e-0c9e39b23d2e"
/>


Release Notes:

- Fixed outline configuration for C++ variables with complex specifiers.