WACS.WASI.GFX

WASI-GFX host bindings for WACS — wasi:graphics-context, wasi:frame-buffer, wasi:surface (all @0.0.1). Backend-agnostic core; the Silk.NET/SDL backend ships as a sibling package. Preview: tracks the wasi-gfx proposal at WASI Phase 2 — the WIT surface may change as the proposal evolves.