Implement native SimpleRenderer reference pipeline (#76)

README.md

@@ -7,7 +7,7 @@ host, bind to, invoke, or ship the .NET implementation. The current
 stage is a compiling structural shell: crate boundaries mirror the .NET library
 projects, public C# type names have Rust declarations, every upstream NUnit
 invocation has a traceable catalog entry, and every sample/tool project has a
-Rust binary target. Types, StructuredData, Imaging, PrimMesher, both rendering adapters, and
+Rust binary target. Types, StructuredData, Imaging, PrimMesher, the MeshFoundry rendering adapter, and
 the main assembly's packet/message/asset/primitive wire-data, core
 runtime/networking, avatar-facing manager, world/social/service manager, RLV,
 LSL tools, Utilities, Vivox, and WebRTC slices now have complete callable,
@@ -441,3 +441,15 @@ application forms with stable escaping, while interest-list modes and unknown
 simulator features are preserved through LLSD capabilities. The cache,
 pagination, cancellation, and compatibility contracts are documented in
 [`docs/discovery.md`](docs/discovery.md).
+
+### Milestone 10
+
+The native `SimpleRenderer` is the milestone's deterministic reference
+pipeline for legacy prim and decoded sculpt-map geometry. It converts checked
+PrimMesher output into shared faceted and simple meshes, preserves prim-face
+texture/material metadata, supplies finite normals and UVs, applies default or
+planar texture transforms, and reports bounded failures with the source
+primitive UUID. It deliberately does not fetch or decode mesh assets; that
+surface remains with MeshFoundry. Supported topology, 16-bit geometry budgets,
+determinism, and the asset boundary are documented in the
+[`SimpleRenderer` guide](crates/libremetaverse-rendering-simple/README.md).