Hunger and thirst HUDs (#18066)

* security HUD now shows a job icon on entities with a body

* thirst goggles

* set starting hud gear

Content.Shared/Overlays/ShowThirstIconsComponent.cs

@@ -0,0 +1,8 @@
+namespace Content.Shared.Overlays
+{
+    /// <summary>
+    /// This component allows you to see the thirstiness of mobs.
+    /// </summary>
+    [RegisterComponent]
+    public sealed class ShowThirstIconsComponent : Component { }
+}