make thief a subgamemode (#25740)

* add SubGamemodes comp/sys

* remove RuleChance from thief rule

* use SubGamemodes for adding thief rule instead of adding ThiefRule component to random gamemodes

* clean up thief rule prototype

* add better logging + end rule if it fails to start

* march 1st incident

* preset ops

* the dreaded

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Server/GameTicking/Rules/Components/SubGamemodesComponent.cs

@@ -0,0 +1,20 @@
+using Content.Server.GameTicking.Rules;
+using Content.Shared.Storage;
+
+namespace Content.Server.GameTicking.Rules.Components;
+
+/// <summary>
+/// When this gamerule is added it has a chance of adding other gamerules.
+/// Since it's done when added and not when started you can still use normal start logic.
+/// Used for starting subgamemodes in game presets.
+/// </summary>
+[RegisterComponent, Access(typeof(SubGamemodesSystem))]
+public sealed partial class SubGamemodesComponent : Component
+{
+    /// <summary>
+    /// Spawn entries for each gamerule prototype.
+    /// Use orGroups if you want to limit rules.
+    /// </summary>
+    [DataField(required: true)]
+    public List<EntitySpawnEntry> Rules = new();
+}