Re-organize all projects (#4166)

Content.Server/DeviceNetwork/IDeviceNetwork.cs

@@ -0,0 +1,24 @@
+using Content.Server.DeviceNetwork.Connections;
+
+namespace Content.Server.DeviceNetwork
+{
+    /// <summary>
+    /// Package based device network allowing devices to communicate with eachother
+    /// </summary>
+    public interface IDeviceNetwork
+    {
+        /// <summary>
+        /// Registers a device with the device network
+        /// </summary>
+        /// <param name="netId"><see cref="NetworkUtils"/>The id of the network to register with</param>
+        /// <param name="frequency">The frequency the device receives packages on. Wired networks use frequency 0</param>
+        /// <param name="messageHandler">The delegate that gets called when the device receives a message</param>
+        /// <param name="receiveAll">If the device should receive all packages on its frequency or only ones addressed to itself</param>
+        /// <returns></returns>
+        public DeviceNetworkConnection Register(int netId, int frequency, OnReceiveNetMessage messageHandler, bool receiveAll = false);
+        /// <see cref="Register(int, int, OnReceiveNetMessage, bool)"/>
+        public DeviceNetworkConnection Register(int netId, OnReceiveNetMessage messageHandler, bool receiveAll = false);
+
+        public void Update();
+    }
+}