Greytide Virus station event (#33547)

* proof of concept

* full implementation

* I commited a crime

* t

* min players increase

Content.Server/StationEvents/Components/GreytideVirusComponent.cs

@@ -0,0 +1,38 @@
+using Content.Server.StationEvents.Events;
+using Content.Shared.Access;
+using Content.Shared.Destructible.Thresholds;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.StationEvents.Components;
+
+/// <summary>
+///     Greytide Virus event specific configuration
+/// </summary>
+[RegisterComponent, Access(typeof(GreytideVirusRule))]
+public sealed partial class GreytideVirusRuleComponent : Component
+{
+    /// <summary>
+    ///     Range from which the severity is randomly picked from.
+    /// </summary>
+    [DataField]
+    public MinMax SeverityRange = new(1, 3);
+
+    /// <summary>
+    ///     Severity corresponding to the number of access groups affected.
+    ///     Will pick randomly from the SeverityRange if not specified.
+    /// </summary>
+    [DataField]
+    public int? Severity;
+
+    /// <summary>
+    ///     Access groups to pick from.
+    /// </summary>
+    [DataField]
+    public List<ProtoId<AccessGroupPrototype>> AccessGroups = new();
+
+    /// <summary>
+    ///     Entities with this access level will be ignored.
+    /// </summary>
+    [DataField]
+    public List<ProtoId<AccessLevelPrototype>> Blacklist = new();
+}