feat: add Windows runtime support

README.md

@@ -16,7 +16,7 @@ AI-Native 3D game engine with pure P/Invoke Vulkan 1.3 render backend.
 - **ECS** — Flecs.NET with Transform, Mesh, Material, Light, Camera, RigidBody components
 - **SDL3 Window** — cross-platform, Vulkan surface
 
-## Quick Start
+## Quick Start — Linux (main platform)
 
 ```bash
 # Build
@@ -38,6 +38,33 @@ dotnet build CORTEX_ENGINE.sln -c Debug
 dotnet test tests/Engine.Tests/Engine.Tests.csproj -c Debug
 ```
 
+## Quick Start — Windows x64
+
+PowerShell scripts select the Windows native runtime assets explicitly; Bash is
+not required:
+
+```powershell
+# Build and restore Windows native dependencies
+dotnet restore .\CORTEX_ENGINE.sln -r win-x64
+dotnet build .\CORTEX_ENGINE.sln -c Debug -r win-x64 --no-restore
+
+# Run the engine
+.\scripts\run.ps1
+
+# Run a demo scene
+.\scripts\run.ps1 --scene shooter
+
+# Run with AI/MCP server
+.\scripts\start_mcp_engine.ps1 -Port 5000
+
+# Run tests
+dotnet test .\tests\Engine.Tests\Engine.Tests.csproj -c Debug -r win-x64
+```
+
+The project keeps Linux as the default RID on Linux hosts and selects `win-x64`
+automatically on Windows. Use `-r win-x64` when cross-publishing from another
+OS.
+
 ## Controls
 
 - **WASD** — move camera