Readme update

README.md

@@ -27,13 +27,31 @@ You should now be ready to use Promul as a relay server for your Unity project.
 ## Engineering
 ```mermaid
 flowchart TD
+    subgraph Unity
+    Code[Your Unity code] -->|Unity Netcode| Runtime[Promul.Runtime.Unity]
+    end
+
+    subgraph Unreal Engine
+    UECode[Your UE code] --> RuntimeUE["Promul.Runtime.Unreal\n(planned)"]
+    end
+
     subgraph "Protocol layer"
-    A[Your Unity code] -->|Unity Netcode| B[Promul.Runtime.Unity]
+    Protocol[Promul.Relay.Protocol]
     end
+    Protocol-->Core
+    Runtime-->Protocol
+        RuntimeUE-->Protocol
+    
+    subgraph Relay server
+    API[Promul.Server.API\nFront-facing]-->Server[Promul.Server]
+    Server-->Protocol
+    end
+
     subgraph Transit layer
-    B --> C[Promul.Common\nKey networking capabilities]
+    Core[Promul\nKey networking capabilities]
+    Core-->Native[Native sockets]
+    Core-->Managed[Managed sockets]
     end
-    D[Promul.Server] -->|Relay server| C
 ```
 
 ### Transit layer

src/Promul.Runtime.Unity/Promul.Runtime.Unity.csproj

@@ -20,10 +20,6 @@
     </ItemGroup>
     <ItemGroup>
         <Content Include="com.fireworkeyes.netcode.transport.promul.asmdef"/>
-        <ProjectReference Include="..\Promul\Promul.csproj">
-            <Project>{009a3a68-30a0-44eb-9b42-8fcb6bd89195}</Project>
-            <Name>Promul.Common</Name>
-        </ProjectReference>
         <ProjectReference Include="..\Promul.Relay.Protocol\Promul.Relay.Protocol.csproj" />
     </ItemGroup>
     <ItemGroup>