Fix BinaryPrimitives being available with System.Memory imported

[Tyrrrz]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.19%. Comparing base (3999e5c) to head (02da4f9).
⚠️ Report is 1 commits behind head on prime.

Additional details and impacted files

@@           Coverage Diff           @@
##            prime     #132   +/-   ##
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  Coverage   99.19%   99.19%           
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  Files         148      148           
  Lines        3981     3981           
  Branches       87       87           
=======================================
  Hits         3949     3949           
  Misses         13       13           
  Partials       19       19           

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[Copilot]

Pull request overview

This PR updates the compilation guard for the NetCore21 BinaryPrimitives polyfill so it is excluded whenever System.Memory is available (either via target framework support or an explicit System.Memory reference), preventing duplicate type conflicts.

Changes:

• Replace the TFM-based preprocessor condition with #if !FEATURE_MEMORY for BinaryPrimitives.
• Align BinaryPrimitives with the existing NetCore21 polyfill gating pattern used by other memory-related shims.

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