_primes_sieve.nx

_primes_sieve.nx -- Sieve of Eratosthenes, NishiLang. Implements the standard "drag race" benchmark from PlummersSoftwareLLC/Primes (Dave's Garage / Dave Plummer): count primes <= 1,000,000. Per Dave's rules: report number of complete passes in a 5-second window. We use a NORMAL byte sieve (1 byte per odd number) -- the "PrimeSieve" base impl Dave compares against. Some entries optimize with bit-packing + wheel factorization; we keep this implementation algorithmically simple to match the reference. We don't have wall-clock in NishiLang, so this version runs a SINGLE pass; the harness shell script wraps with time/loop logic to report passes/sec.