Add ghost role raffles (#26629)

* Add ghost role raffles

* GRR: Fix dialogue sizing, fix merge

* GRR: Add raffle deciders (winner picker)

* GRR: Make settings prototype based with option to override

* GRR: Use Raffles folder and namespace

* GRR: DataFieldify and TimeSpanify

* GRR: Don't actually DataFieldify HashSet<ICommonSession>s

* GRR: add GetGhostRoleCount() + docs

* update engine on branch

* Ghost role raffles: docs, fix window size, cleanup, etc

* GRR: Admin UI

* GRR: Admin UI: Display initial/max/ext of selected raffle settings proto

* GRR: Make a ton of roles raffled

Content.Shared/Ghost/Roles/Raffles/GhostRoleRaffleSettings.cs

@@ -0,0 +1,30 @@
+namespace Content.Server.Ghost.Roles.Raffles;
+
+/// <summary>
+/// Defines settings for a ghost role raffle.
+/// </summary>
+[DataDefinition]
+public sealed partial class GhostRoleRaffleSettings
+{
+    /// <summary>
+    /// The initial duration of a raffle in seconds. This is the countdown timer's value when the raffle starts.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField(required: true)]
+    public uint InitialDuration { get; set; }
+
+    /// <summary>
+    /// When the raffle is joined by a player, the countdown timer is extended by this value in seconds.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField(required: true)]
+    public uint JoinExtendsDurationBy { get; set; }
+
+    /// <summary>
+    /// The maximum duration in seconds for the ghost role raffle. A raffle cannot run for longer than this
+    /// duration, even if extended by joiners. Must be greater than or equal to <see cref="InitialDuration"/>.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField(required: true)]
+    public uint MaxDuration { get; set; }
+}