Implement Slice iterator and utility methods.

[crutcher]

• Add SliceIter struct and implement Iterator for Slice.
• Enable Slice to be converted into an iterator using IntoIterator.
• Add utility methods: into_vec and clip_size for enhanced slice manipulation.
• Include comprehensive unit tests for new functionality.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.29%. Comparing base (6da9c5b) to head (ccc4e46).
⚠️ Report is 1 commits behind head on main.

❌ Your project check has failed because the head coverage (67.29%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4042      +/-   ##
==========================================
+ Coverage   67.25%   67.29%   +0.04%     
==========================================
  Files        1223     1223              
  Lines      150674   150724      +50     
==========================================
+ Hits       101330   101430     +100     
+ Misses      49344    49294      -50     

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