add macOS ARM64 wheel build

[pb-dod]

Fixes: #409

Adds macOS ARM64 wheel build while maintaining x86_64 wheel support. This helps address installation issues on Apple Silicon Macs where users currently need to build from source, which can be problematic due to C++ compiler requirements (see #409).

Changes

• Added bdist_wheel command with macosx-12.6-arm64 platform tag
• Maintained existing macosx-12.6-x86_64 wheel for Intel Mac support

Why

Currently, users on Apple Silicon Macs may need to build from source, which requires specific Xcode Command Line Tools versions and C++ compiler configurations. By providing pre-built wheels for both architectures, we can:

1. Reduce installation friction for users on both Intel and Apple Silicon Macs
2. Avoid compiler-related issues described in Missing C++ Standard Library Headers When Building Wheels On Mac #409
3. Ensure proper compilation of C++ extensions for each architecture

Testing Help Needed

@thomasrockhu-codecov Could you help test this change? We need to verify:

• ARM64 wheel builds successfully
• Installation works on both M1/M2 and Intel Macs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.66%. Comparing base (b7033a9) to head (98920f7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #580      +/-   ##
==========================================
- Coverage   95.67%   95.66%   -0.01%     
==========================================
  Files          86       83       -3     
  Lines        3120     3117       -3     
==========================================
- Hits         2985     2982       -3     
  Misses        135      135              

Flag	Coverage Δ
python3.10	?
python3.11	?
python3.12	95.92% <ø> (ø)
python3.8	?
python3.9	?

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