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.Server/DeviceLinking/Components/AutoLinkTransmitterComponent.cs

@@ -0,0 +1,12 @@
+namespace Content.Server.DeviceLinking.Components;
+
+/// <summary>
+/// This is used for automatic linkage with various receivers, like shutters.
+/// </summary>
+[RegisterComponent]
+public sealed class AutoLinkTransmitterComponent : Component
+{
+    [DataField("channel", required: true, readOnly: true)]
+    public string AutoLinkChannel = default!;
+}
+