Put IComm.WebSockets and Lua comm.ws_* behind #ifdef ENABLE_WEBSOCKETS

Not confident in the API shape, especially for ApiHawk

src/BizHawk.Client.Common/Api/Interfaces/ICommApi.cs

@@ -10,7 +10,9 @@ namespace BizHawk.Client.Common
 
 		SocketServer? Sockets { get; }
 
+#if ENABLE_WEBSOCKETS
 		WebSocketServer? WebSockets { get; }
+#endif
 
 		string? HttpTest();
 

src/BizHawk.Client.Common/lua/CommonLibs/CommLuaLibrary.cs

@@ -247,6 +247,7 @@ namespace BizHawk.Client.Common
 			}
 		}
 
+#if ENABLE_WEBSOCKETS
 		[LuaMethod("ws_open", "Opens a websocket and returns the id so that it can be retrieved later.")]
 		[LuaMethodExample("local ws_id = comm.ws_open(\"wss://echo.websocket.org\");")]
 		public string WebSocketOpen(string uri)
@@ -287,5 +288,6 @@ namespace BizHawk.Client.Common
 		{
 			if (_websockets.TryGetValue(Guid.Parse(guid), out var wrapper)) wrapper.Close(status, closeMessage);
 		}
+#endif
 	}
 }