Mega Antag Refactor (#25786)

* Mega Antag Refactor

* last minute delta save

* more workshopping

* more shit

* ok tested this for once

* okkkkk sure

* generic delays for starting rules

* well darn

* nukies partially

* ouagh

* ballin' faded and smonkin wed

* obliterated the diff

* Spread my arms and soak up congratulations

* I've got plenty of love, but nothing to show for it

* but there’s too much sunlight
Shining on my laptop monitor, so I
Can’t see anything with any amount of clarity

* ok this junk

* OOK!

* fubar

* most of sloth's review

* oh boy

* eek

* hell yea!

* ASDFJASDJFvsakcvjkzjnhhhyh

Content.Server/GameTicking/Components/GameRuleComponent.cs

@@ -0,0 +1,51 @@
+using Content.Server.Destructible.Thresholds;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+
+namespace Content.Server.GameTicking.Components;
+
+/// <summary>
+/// Component attached to all gamerule entities.
+/// Used to both track the entity as well as store basic data
+/// </summary>
+[RegisterComponent]
+public sealed partial class GameRuleComponent : Component
+{
+    /// <summary>
+    /// Game time when game rule was activated
+    /// </summary>
+    [DataField(customTypeSerializer: typeof(TimeOffsetSerializer))]
+    public TimeSpan ActivatedAt;
+
+    /// <summary>
+    /// The minimum amount of players needed for this game rule.
+    /// </summary>
+    [DataField]
+    public int MinPlayers;
+
+    /// <summary>
+    /// A delay for when the rule the is started and when the starting logic actually runs.
+    /// </summary>
+    [DataField]
+    public MinMax? Delay;
+}
+
+/// <summary>
+/// Raised when a rule is added but hasn't formally begun yet.
+/// Good for announcing station events and other such things.
+/// </summary>
+[ByRefEvent]
+public readonly record struct GameRuleAddedEvent(EntityUid RuleEntity, string RuleId);
+
+/// <summary>
+/// Raised when the rule actually begins.
+/// Player-facing logic should begin here.
+/// </summary>
+[ByRefEvent]
+public readonly record struct GameRuleStartedEvent(EntityUid RuleEntity, string RuleId);
+
+/// <summary>
+/// Raised when the rule ends.
+/// Do cleanup and other such things here.
+/// </summary>
+[ByRefEvent]
+public readonly record struct GameRuleEndedEvent(EntityUid RuleEntity, string RuleId);