Implement Intrinsic UIs (#6926)

* Implement Intrinsic UIs, allowing the admin ghost to double as a computer.

* ignore moment

* remove debug statement, sort the actions.

* ffs

* didn't ever use this and don't need to, removed.

* rm dead code

* lil bit of commenting.

Content.Server/UserInterface/IntrinsicUIComponent.cs

@@ -0,0 +1,56 @@
+using Content.Shared.Actions.ActionTypes;
+using JetBrains.Annotations;
+using Robust.Server.GameObjects;
+using Robust.Shared.Reflection;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.UserInterface;
+
+[RegisterComponent]
+public sealed class IntrinsicUIComponent : Component, ISerializationHooks
+{
+    /// <summary>
+    /// List of UIs and their actions that this entity has.
+    /// </summary>
+    [ViewVariables, DataField("uis", required: true)]
+    public List<IntrinsicUIEntry> UIs = new();
+
+    void ISerializationHooks.AfterDeserialization()
+    {
+        foreach (var ui in UIs)
+        {
+            ui.AfterDeserialization();
+        }
+    }
+}
+
+[DataDefinition]
+public struct IntrinsicUIEntry
+{
+    [ViewVariables]
+    public Enum? Key { get; set; }
+
+    /// <summary>
+    /// The BUI key that this intrinsic UI should open.
+    /// </summary>
+    [DataField("key", readOnly: true, required: true)]
+    private string _keyRaw = default!;
+
+    /// <summary>
+    /// The action used for this BUI.
+    /// </summary>
+    [DataField("toggleAction", required: true)]
+    public InstantAction ToggleAction = new();
+
+    public void AfterDeserialization()
+    {
+        var reflectionManager = IoCManager.Resolve<IReflectionManager>();
+        if (reflectionManager.TryParseEnumReference(_keyRaw, out var key))
+            Key = key;
+
+        if (ToggleAction.Event is ToggleIntrinsicUIEvent ev)
+        {
+            ev.Key = Key;
+        }
+    }
+}