PDA UI refactor and cartridges (#11335)

* Work on cartridges

* Work on PDA UI

* Work on PDA UIs program list

* Work on PDA UI borders

* Add DeviceNetworkingComponent to the pda base prototype

* Fix submodule version

* Fix cartridge loader ui key

* Fix pda menu xaml

* Implement relaying ui messages

* Finish implementing the notekeeper cartridge

* Fix submodule version

* Fix errors from merging master

* Fix test failing

* Implement setting preinstalled programs

* Add some documentation to CartridgeLoaderSystem

* Add more doc comments

* Add localization to program names

* Implement review suggestions

* Fix background programs receiving events twice when active

Content.Shared/CartridgeLoader/SharedCartridgeLoaderComponent.cs

@@ -0,0 +1,36 @@
+using Content.Shared.Containers.ItemSlots;
+
+namespace Content.Shared.CartridgeLoader;
+
+[Access(typeof(SharedCartridgeLoaderSystem))]
+public abstract class SharedCartridgeLoaderComponent : Component
+{
+    public const string CartridgeSlotId = "Cartridge-Slot";
+
+    [DataField("cartridgeSlot")]
+    public ItemSlot CartridgeSlot = new();
+
+    /// <summary>
+    /// List of programs that come preinstalled with this cartridge loader
+    /// </summary>
+    [DataField("preinstalled")]
+    public List<string> PreinstalledPrograms = new();
+
+    /// <summary>
+    /// The currently running program that has its ui showing
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    public EntityUid? ActiveProgram = default;
+
+    /// <summary>
+    /// The list of programs running in the background, listening to certain events
+    /// </summary>
+    [ViewVariables]
+    public readonly List<EntityUid> BackgroundPrograms = new();
+
+    /// <summary>
+    /// The list of program entities that are spawned into the cartridge loaders program container
+    /// </summary>
+    [DataField("installedCartridges")]
+    public List<EntityUid> InstalledPrograms = new();
+}