v0.1.0

Added

• dtoa / ftoa: shortest f64/f32 to string, byte-for-byte V8 Number.toString.
• dtoa_buffered / ftoa_buffered: allocation-free, write UTF-16 into your buffer.
• SIMD digit kernel with a scalar SWAR fallback.
• Power-of-ten tables baked at compile time (no runtime setup).
• Verified against V8 (tests, verify, fuzzer); 100% coverage.
• Smaller binaries via -Oz. The f64 pow10 table now has a Dragonbox-style
  compressed form: a ~5 KB anchor cache reconstructed at load (one multiply-by-5
  per in-between power) replaces the full ~9.9 KB table, selected automatically by
  ASC_SHRINK_LEVEL (-Os/-Oz) and bit-identical to the full table. Cuts
  the f64 module from ~13.4 KB to ~9.0 KB; an f32-only build is ~2.9 KB.
• Differential fuzzer and verifier now cover all build targets against the V8
  oracle — full-table f64, compressed f64, and the compact f32 — with
  per-target tallies (scripts/dtoa/{build,fuzz,verify}.mjs).
• The as-test suite runs every spec across the full matrix of SIMD/SWAR ×
  ASC_SHRINK_LEVEL 0/1/2, so every table and digit-path condition is exercised.

Changed

• f64 core swapped to an AssemblyScript port of xjb64 v2, preserving the
  ECMAScript formatting surface byte-for-byte.
• f32 core swapped to a self-contained port of xjb's compact single-hi-
  multiply core (24-bit significand ⇒ a hi-only pow10 table and a narrow 64×24
  product) — smaller and faster than the prior Żmij/xjb-derived shared-table path,
  with identical output (verified exhaustively over all 2³² floats).
• Source split into focused modules under assembly/: dtoa.ts (f64),
  ftoa.ts (compact f32), and the shared f64 engine xjb.ts.
• Pruned f32-only code that became unreachable once ftoa.ts went
  self-contained (orphaned digit/layout helpers in xjb.ts, an f64-impossible
  exponent branch, etc.) and specialized the shared layout writer to f64 -
  restoring 100% line/branch coverage across all three modules.
• Vendored the upstream xjb paper and source snapshot used for the f64 and
  f32 ports under vendor/xjb/81af30358003c98eda6429fbff0d826e0c259302/, and
  added Apache-2.0 notice files for the xjb-derived implementations.