Adds Hellspawn (Nar'Sie demon mob) (#20291)

* HellSpawn Mob

* added spawner

* summary for the namespace

* larger collider, cannot enter single tile corridors.

* fix

* remove duplicate from yml, fix attributions.

* moved action to shared, moved comp to shared, networked comp, separated heal, fixed attributions

* removed flammable from hellspawn
removed the healing effect from firestarter ability (healing can be separate ability).

* Update attributions.yml

fix attributions

* fix

* fix

Content.Shared/Abilities/Firestarter/FirestarterComponent.cs

@@ -0,0 +1,34 @@
+using Robust.Shared.Prototypes;
+using Robust.Shared.Audio;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Abilities.Firestarter;
+
+/// <summary>
+/// Lets its owner entity ignite flammables around it and also heal some damage.
+/// </summary>
+[RegisterComponent, NetworkedComponent, Access(typeof(SharedFirestarterSystem))]
+public sealed partial class FirestarterComponent : Component
+{
+    /// <summary>
+    /// Radius of objects that will be ignited if flammable.
+    /// </summary>
+    [DataField("ignitionRadius")]
+    public float IgnitionRadius = 4f;
+
+    /// <summary>
+    /// The action entity.
+    /// </summary>
+    [DataField("fireStarterAction", customTypeSerializer: typeof(PrototypeIdSerializer<EntityPrototype>))]
+    public string? FireStarterAction = "ActionFireStarter";
+
+    [DataField("fireStarterActionEntity")] public EntityUid? FireStarterActionEntity;
+
+
+    /// <summary>
+    /// Radius of objects that will be ignited if flammable.
+    /// </summary>
+    [DataField("igniteSound")]
+    public SoundSpecifier IgniteSound = new SoundPathSpecifier("/Audio/Magic/rumble.ogg");
+}

Content.Shared/Abilities/Firestarter/SharedFirestarterSystem.cs

@@ -0,0 +1,22 @@
+using Content.Shared.Actions;
+
+namespace Content.Shared.Abilities.Firestarter;
+
+public sealed class SharedFirestarterSystem : EntitySystem
+{
+    [Dependency] private readonly SharedActionsSystem _actionsSystem = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<FirestarterComponent, ComponentInit>(OnComponentInit);
+    }
+
+    /// <summary>
+    /// Adds the firestarter action.
+    /// </summary>
+    private void OnComponentInit(EntityUid uid, FirestarterComponent component, ComponentInit args)
+    {
+        _actionsSystem.AddAction(uid, ref component.FireStarterActionEntity, component.FireStarterAction, uid);
+    }
+}

Content.Shared/Actions/Events/FireStarterActionEvent.cs

@@ -0,0 +1,10 @@
+namespace Content.Shared.Actions.Events;
+
+public sealed partial class FireStarterActionEvent : InstantActionEvent
+{
+    /// <summary>
+    /// Increases the number of fire stacks when a flammable object is ignited.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    public float Severity = 0.3f;
+}