Refactor actions to be entities with components (#19900)

Content.Shared/Magic/MagicSpawnData.cs

@@ -0,0 +1,20 @@
+namespace Content.Shared.Magic;
+
+[ImplicitDataDefinitionForInheritors]
+public abstract partial class MagicSpawnData
+{
+
+}
+
+/// <summary>
+/// Spawns 1 at the caster's feet.
+/// </summary>
+public sealed partial class TargetCasterPos : MagicSpawnData {}
+
+/// <summary>
+/// Targets the 3 tiles in front of the caster.
+/// </summary>
+public sealed partial class TargetInFront : MagicSpawnData
+{
+    [DataField("width")] public int Width = 3;
+}