Adds packages/cultmesh-ts/src/realtime-quic-native.ts: a lazy koffi binding
over the twelve v2 queue exports plus cultmesh_quic_last_status
(native/GameCult.Mesh.Quic.Native/include/cultmesh_quic_native.h). koffi is
required only inside loadBindings(), so a consumer that never touches QUIC
loads no native module. CultMeshQuicNativeRuntime is a process-wide,
reference-counted singleton running one event pump (a loop awaiting
nextEvent.async with a 250ms timeout, no koffi callbacks) that dispatches
decoded events to registered listener/connection handlers by id.
Also: add the koffi 3.3.0 dependency to cultmesh-ts's package.json, and switch
its tsconfig from classic Node resolution to Node16 so `cultnet-ts/contracts`
(a package.json `exports` subpath) actually resolves — a gap Cut 1 recorded
and left for this cut ("until Cut 4 changes it").
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
