Device Linking and better linking ui (#13645)

Co-authored-by: AJCM-git <60196617+AJCM-git@users.noreply.github.com>
Co-authored-by: Visne <39844191+Visne@users.noreply.github.com>
Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Shared/DeviceLinking/DeviceLinkSinkComponent.cs

@@ -0,0 +1,22 @@
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Set;
+
+namespace Content.Shared.DeviceLinking;
+
+[RegisterComponent]
+[NetworkedComponent] // for interactions. Actual state isn't currently synced.
+[Access(typeof(SharedDeviceLinkSystem))]
+public sealed class DeviceLinkSinkComponent : Component
+{
+    /// <summary>
+    /// The ports this sink has
+    /// </summary>
+    [DataField("ports", customTypeSerializer: typeof(PrototypeIdHashSetSerializer<SinkPortPrototype>))]
+    public HashSet<string>? Ports;
+
+    /// <summary>
+    /// Used for removing a sink from all linked sources when it gets removed
+    /// </summary>
+    [DataField("links")]
+    public HashSet<EntityUid> LinkedSources = new();
+}