IListener and IRadio purge (#11980)

Content.Server/Radio/Components/RadioSpeakerComponent.cs

@@ -0,0 +1,19 @@
+using Content.Server.Radio.EntitySystems;
+using Content.Shared.Radio;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Set;
+
+namespace Content.Server.Radio.Components;
+
+/// <summary>
+///     Listens for radio messages and relays them to local chat.
+/// </summary>
+[RegisterComponent]
+[Access(typeof(RadioDeviceSystem))]
+public sealed class RadioSpeakerComponent : Component
+{
+    [DataField("channels", customTypeSerializer: typeof(PrototypeIdHashSetSerializer<RadioChannelPrototype>))]
+    public HashSet<string> Channels = new () { "Common" };
+
+    [DataField("enabled")]
+    public bool Enabled;
+}