refactor(assets): move sprite renderer to standalone project at renderer/

Separates the 3D-to-2D render pipeline from the game client into its
own minimal Godot project. No autoloads, no plugins, no game code —
just the render scene, models, textures, and export script. Eliminates
SimBridge parse errors and gdUnit4 scanning during renders.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

renderer/project.godot

@@ -0,0 +1,14 @@
+; Sprite Renderer — standalone Godot project for 3D-to-2D sprite pipeline.
+; No game logic, no autoloads, no plugins. Just rendering.
+
+config_version=5
+
+[application]
+
+config/name="Settled Reach Sprite Renderer"
+config/features=PackedStringArray("4.6", "GL Compatibility")
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"