Roundstart variation game rules (#24397)

* Raise `StationPostInitEvent` broadcast

* Basic variation pass handling

* standardize names + rule entities

* why does it work like that?

* add to defaults

* light break variation pass

* ent spawn entry

* move some stationevent utility functions to gamerule + add one for finding random tile on specified station

* forgot how statistics works

* powered light variation pass is good now

* station tile count function

* public method to ensure all solutions (for procedural use before mapinit)

* move gamerulesystem utility funcs to partial

* ensure all solutions before spilling in puddlesystem. for use when spilling before mapinit

* trash & puddle variation passes!

* oh yeah

* ehh lets live a little

* std

* utility for game rule check based on comp

* entprotoid the trash spawner oops

* generalize trash variation

* use added instead of started for secret rule

* random cleanup

* generic replacement variation system

* Wall rusting variation rule

* account for modifying while enumerating

* use localaabb

* fix test

* minor tweaks

* reinforced wall replacer + puddletweaker

Content.Server/GameTicking/Rules/VariationPass/Components/PoweredLightVariationPassComponent.cs

@@ -0,0 +1,38 @@
+using Content.Shared.Light.Components;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.GameTicking.Rules.VariationPass.Components;
+
+/// <summary>
+/// This handle randomly destroying lights, causing them to flicker endlessly, or replacing their tube/bulb with different variants.
+/// </summary>
+[RegisterComponent]
+public sealed partial class PoweredLightVariationPassComponent : Component
+{
+    /// <summary>
+    ///     Chance that a light will be replaced with a broken variant.
+    /// </summary>
+    [DataField]
+    public float LightBreakChance = 0.15f;
+
+    /// <summary>
+    ///     Chance that a light will be replaced with an aged variant.
+    /// </summary>
+    [DataField]
+    public float LightAgingChance = 0.05f;
+
+    [DataField]
+    public float AgedLightTubeFlickerChance = 0.03f;
+
+    [DataField]
+    public EntProtoId BrokenLightBulbPrototype = "LightBulbBroken";
+
+    [DataField]
+    public EntProtoId BrokenLightTubePrototype = "LightTubeBroken";
+
+    [DataField]
+    public EntProtoId AgedLightBulbPrototype = "LightBulbOld";
+
+    [DataField]
+    public EntProtoId AgedLightTubePrototype = "LightTubeOld";
+}