Add support for NEON SIMD to ensure vectorization on ARM hardware

[dylanrb123]

Description

Adds support for NEON SIMD implementation on ARM hardware. The existing SIMD implementations (SSE, AVX, and AVX512F) are x86 only, so when running on ARM hardware Voyager would run the scalar distance calculations instead of vectorized.

Changes Made

Added NEON SIMD implementations for the different distance calculations

C++

n/a

Python

n/a

Java

n/a

Testing

All unit tests pass, built and ran locally on my M1 macbook and verified the presence of NEON instructions in the binary:

➜ objdump -d /Users/dbannon/dev/voyager/cpp/build/test/VoyagerTests | grep fmla
100001f8c: 4e22cc20     fmla.4s v0, v1, v2
100002020: 4e22cc20     fmla.4s v0, v1, v2
1000020b4: 4e22cc20     fmla.4s v0, v1, v2
100002148: 4e22cc20     fmla.4s v0, v1, v2
10000232c: 4e22cc20     fmla.4s v0, v1, v2
100002860: 4e22cc20     fmla.4s v0, v1, v2
1000028cc: 4e22cc20     fmla.4s v0, v1, v2
100002938: 4e22cc20     fmla.4s v0, v1, v2
1000029a4: 4e22cc20     fmla.4s v0, v1, v2
100002c18: 4e22cc20     fmla.4s v0, v1, v2
100002c84: 4e22cc20     fmla.4s v0, v1, v2
100002cf0: 4e22cc20     fmla.4s v0, v1, v2
100002d5c: 4e22cc20     fmla.4s v0, v1, v2
100002e7c: 4e22cc20     fmla.4s v0, v1, v2

Checklist

• My code follows the code style of this project.
• I have added and/or updated appropriate documentation (if applicable).
• All new and existing tests pass locally with these changes.
• I have run static code analysis (if available) and resolved any issues.
• I have considered backward compatibility (if applicable).
• I have confirmed that this PR does not introduce any security vulnerabilities.

Additional Comments