Add the ability to spawn in as a vent critter at will (#6187)

* Add the ability to spawn in as a vent critter at will

* cooldown

Content.Shared/_DV/CCVars/DCCVars.cs

@@ -222,6 +222,12 @@ public sealed partial class DCCVars
     public static readonly CVarDef<bool> EnablePresetCooldowns =
         CVarDef.Create("game.enable_preset_cooldowns", false, CVar.SERVERONLY);
 
+    /// <summary>
+    ///     The amount of time a player must wait after spawning as a vent critter ghost role before spawning as another one
+    /// </summary>
+    public static readonly CVarDef<TimeSpan> VentCritterGhostRoleSpawnCooldown =
+        CVarDef.Create("ghost.vent_critter_spawn_cooldown", TimeSpan.FromMinutes(3), CVar.SERVERONLY);
+
     /// <summary>
     /// A string containing a list of newline-separated strings to be highlighted in the chat. Use this instead of Wizden's CVar.
     /// </summary>

Content.Shared/_DV/Ghost/Roles/DVSpawnableGhostRoleEvent.cs

@@ -0,0 +1,19 @@
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared._DV.Ghost.Roles;
+
+[Serializable, NetSerializable]
+public sealed class DVSpawnableGhostRoleRequestEvent(ProtoId<DVSpawnableGhostRolePrototype> prototype) : EntityEventArgs
+{
+    public ProtoId<DVSpawnableGhostRolePrototype> Prototype = prototype;
+}
+
+[Serializable, NetSerializable]
+public sealed class DVSpawnableGhostRoleCooldownRequestEvent : EntityEventArgs;
+
+[Serializable, NetSerializable]
+public sealed class DVSpawnableGhostRoleCooldownUpdateEvent(TimeSpan? cooldownEnd) : EntityEventArgs
+{
+    public TimeSpan? CooldownEnd = cooldownEnd;
+}

Content.Shared/_DV/Ghost/Roles/DVSpawnableGhostRolePrototype.cs

@@ -0,0 +1,23 @@
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared._DV.Ghost.Roles;
+
+[Prototype("dvSpawnableGhostRole")]
+public sealed partial class DVSpawnableGhostRolePrototype : IPrototype
+{
+    [IdDataField]
+    public string ID { get; private set; } = default!;
+
+    public LocId Name => $"dv-spawnable-{ID}.name";
+
+    public LocId Description => $"dv-spawnable-{ID}.description";
+
+    [DataField(required: true)]
+    public LocId Rules;
+
+    [DataField]
+    public List<EntProtoId> MindRoles = new() { "MindRoleGhostRoleNeutral" };
+
+    [DataField(required: true)]
+    public EntProtoId Entity;
+}