Improve power-of-two SPSC performance on clang

Update SPSC benchmarks

Optimize non-power of two modulo for spsc

Fix incorrect mpmc queues in spsc_bench

Update x86_64 SPSC benchmark

Add BufferType template parameter

Improve performance for trivial types

Fix segfault for too large comptime-known size

Add missing [[nodiscard]] to try_push

Improve size method

Update README.md

Ensure buffer is cache-line aligned

Initial commit