chore(msrv): bump MSRV to 1.96.0

[CraZySacX]

Summary

• Bump the minimum supported Rust version from 1.95.0 to 1.96.0 across all workspace crates and CI workflows
• Update README MSRV reference

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.21%. Comparing base (13e7cb6) to head (9b29ff4).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #519      +/-   ##
==========================================
+ Coverage   98.02%   98.21%   +0.18%     
==========================================
  Files          25       25              
  Lines        6492     6492              
==========================================
+ Hits         6364     6376      +12     
+ Misses        128      116      -12     

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