fix: use native Windows ARM64 binary for Bun >= 1.3.10 (#165)

Bun v1.3.10 ships native Windows ARM64 binaries. Update
getArchitecture() and getAvx2() to be version-aware so that
windows-11-arm runners download bun-windows-aarch64.zip instead of
falling back to bun-windows-x64-baseline.zip. The x64 fallback is
preserved for older versions that lack ARM64 assets.

Closes #164

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/test.yml

@@ -57,6 +57,7 @@ jobs:
           - latest
           - canary
           - "1.1.0"
+          - "1.3.10"
           - "1.x"
           - "1"
           - "> 1.0.0"