Adds the thermo-electric generator (#18840)

* Basic TEG start.

Connects via node group.

* Basic TEG test map

* Sensor monitoring basics, TEG circulator flow

* Basic power generation (it doesn't work)

* More sensor monitoring work

* Battery (SMES) monitoring system.

* Sensor monitoring fixes

Make it work properly when mapped.

* Test map improvements

* Revise TEG power output mechanism.

Now uses a fixed supplier with a custom ramping system.

* TEG test map fixes

* Make air alarms and pumps open UI on activate.

* Clean up thermo machines power switch.

Removed separate Enabled bool from the component that always matched the power receiver's state.

This enables adding a PowerSwitch component to give us alt click/verb menu.

* TEG but now fancy

* Make sensor monitoring console obviously WiP to mappers.

* Vending machine sound, because of course.

* Terrible, terrible graph background color

* Examine improvements for the TEG.

* Account for electrical power when equalizing gas mixtures.

* Get rid of the TegCirculatorArrow logic.

Use TimedDespawn instead. The "no show in right-click menuu" goes into a new general-purpose component.

Thanks Julian.

* Put big notice of "not ready, here's why" on the sensor monitoring console.

* TryGetComponent -> TryComp

* Lol there's a HideContextMenu tag

* Test fixes

* Guidebook for TEG

Fixed rotation on GuideEntityEmbed not working correctly.

Added Margin property to GuideEntityEmbed

* Make TEG power bar default to invisible.

So it doesn't appear in the guidebook and spawn menu.

Content.Server/SensorMonitoring/SensorMonitoringConsoleComponent.cs

@@ -0,0 +1,64 @@
+using Content.Shared.SensorMonitoring;
+using Robust.Server.Player;
+using Robust.Shared.Collections;
+
+namespace Content.Server.SensorMonitoring;
+
+[RegisterComponent]
+public sealed class SensorMonitoringConsoleComponent : Component
+{
+    /// <summary>
+    /// Used to assign network IDs for sensors and sensor streams.
+    /// </summary>
+    public int IdCounter;
+
+    /// <summary>
+    /// If enabled, additional data streams are shown intended to only be visible for debugging.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField("debug_streams")]
+    public bool DebugStreams = false;
+
+    [ViewVariables(VVAccess.ReadWrite)]
+    public Dictionary<EntityUid, SensorData> Sensors = new();
+
+    [DataField("retentionTime")]
+    public TimeSpan RetentionTime = TimeSpan.FromMinutes(1);
+
+    // UI update tracking stuff.
+    public HashSet<IPlayerSession> InitialUIStateSent = new();
+    public TimeSpan LastUIUpdate;
+    public ValueList<int> RemovedSensors;
+
+    public sealed class SensorData
+    {
+        [ViewVariables(VVAccess.ReadWrite)]
+        public int NetId;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public SensorDeviceType DeviceType;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public Dictionary<string, SensorStream> Streams = new();
+    }
+
+    public sealed class SensorStream
+    {
+        [ViewVariables(VVAccess.ReadWrite)]
+        public int NetId;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public SensorUnit Unit;
+
+        // Queue<T> is a ring buffer internally, and we can still iterate over it.
+        // I don't wanna write a ring buffer myself, so this is pretty convenient!
+        [ViewVariables]
+        public Queue<SensorSample> Samples = new();
+    }
+
+    public sealed class ViewingPlayer
+    {
+
+    }
+}
+