The WASM+SIMD linear audio resampler (interleaved S16LE stereo, any src→dst
rate) is carved out of romdevtools' src/playtest/resampler/ into its own
zero-dep npm package so other projects can consume it — retroemu's terminal
audio path needs it to resample fractional-rate cores (e.g. the GameTank ACP's
~13983 Hz) up to a fixed device rate, the way a libretro frontend does.

romdevtools depends on romdev-audio-resampler@0.1.0 and imports it in the
playtest audio sink instead of the in-tree copy. No behavior change; the
publish script auto-discovers the new package (wasm verified across 30 pkgs).