Convert Remaining Atmos Appearance Visualizers (#9582)

* Convert atmos plaque to generic visualizer

Use generic visualizer for atmos plaque. Also enables zumos plaque to
appear.

* Convert gas canister connecters

* Remove manual layer creation

* Remove gas canister visualizer

* Convert gas analyzers to generic visualizers

* Convert fire visualizer

* Fix layers on plasma and air canisters

* Remove commented out fire visualizer in barricades

* Add documentation for fire visuals component

* Remove redundant visualizer for milkalyzer

* Remove rogue item group

Content.Client/Atmos/Components/FireVisualsComponent.cs

@@ -0,0 +1,21 @@
+namespace Content.Client.Atmos.Components;
+
+/// <summary>
+/// Sets which sprite RSI is used for displaying the fire visuals and what state to use based on the fire stacks
+/// accumulated.
+/// </summary>
+[RegisterComponent]
+public sealed class FireVisualsComponent : Component
+{
+    [DataField("fireStackAlternateState")]
+    public int FireStackAlternateState = 3;
+
+    [DataField("normalState")]
+    public string? NormalState;
+
+    [DataField("alternateState")]
+    public string? AlternateState;
+
+    [DataField("sprite")]
+    public string? Sprite;
+}