a4f845a465
- Added CPU variant support for x64 native addons with modern (AVX2/x86-64-v3) and baseline (x86-64-v2) variants, enabling automatic fallback when modern variants are unavailable. - Added automatic AVX2 CPU detection on Linux, macOS, and Windows platforms to select appropriate native addon variant at runtime. - Updated native addon filename scheme to include CPU variant suffix (e.g., pi_natives.linux-x64-modern.node) for x64 platforms. - Updated CLI update mechanism to support downloading and installing multiple native addon variants per platform with fallback support. - Removed fallback untagged pi_natives.node binary creation; platform and variant-tagged binaries are now required.