More natvis

[jxy-s]

This PR implements more natvis debug visualizers for Radiant types:

• rad::Result
• rad::UniqueResource
• rad::Integer
• rad::LockExclusive
• rad::LockShared
• rad::RelockableExclusive
• rad::RelockableShared
• rad::Atomic
• rad::SharedPtr
• rad::WeakPtr
• rad::AtomicSharedPtr
• rad::AtomicWeakPtr

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.99%. Comparing base (35ef209) to head (7434a9e).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   90.95%   90.99%   +0.04%     
==========================================
  Files          17       17              
  Lines        2199     2199              
  Branches      261      261              
==========================================
+ Hits         2000     2001       +1     
  Misses         14       14              
+ Partials      185      184       -1     

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