Turn ReagentEffects into generic EntityEffects (#28168)

* Oh the possibilities

* Merge fixes

* Forgot to remote LavaSystem oops

* Changed EntityEffectArgs to EntityEffectBaseArgs and EntityEffectReagentArgs

* Throw exception for unimplemented effectargs

* Remove Json and overrideable datafields

* Fix test issues

* Actually fix the compiling issue

* Fix comments and remove EntityEffectArgs (no longer used, replaced with EntityEffectBaseArgs)

Content.Server/EntityEffects/Effects/Polymorph.cs

@@ -0,0 +1,34 @@
+using Content.Server.Polymorph.Components;
+using Content.Server.Polymorph.Systems;
+using Content.Shared.EntityEffects;
+using Content.Shared.Polymorph;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+using Content.Shared.EntityEffects;
+
+namespace Content.Server.EntityEffects.Effects;
+
+public sealed partial class Polymorph : EntityEffect
+{
+    /// <summary>
+    ///     What polymorph prototype is used on effect
+    /// </summary>
+    [DataField("prototype", customTypeSerializer:typeof(PrototypeIdSerializer<PolymorphPrototype>))]
+    public string PolymorphPrototype { get; set; }
+
+    protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys)
+    => Loc.GetString("reagent-effect-guidebook-make-polymorph",
+            ("chance", Probability), ("entityname",
+                prototype.Index<EntityPrototype>(prototype.Index<PolymorphPrototype>(PolymorphPrototype).Configuration.Entity).Name));
+
+    public override void Effect(EntityEffectBaseArgs args)
+    {
+        var entityManager = args.EntityManager;
+        var uid = args.TargetEntity;
+        var polySystem = entityManager.System<PolymorphSystem>();
+
+        // Make it into a prototype
+        entityManager.EnsureComponent<PolymorphableComponent>(uid);
+        polySystem.PolymorphEntity(uid, PolymorphPrototype);
+    }
+}