Move entity effects definitions to shared (#35614)

* Move entity effects to shared

* relocate spawning to server

* Generic version of EntityEffect for just raising event.

* genericise everything

* oops forgot to push you

* some condensation

* finish rebas

* unwhite the space

* oops forgot nuke

* bad rebase fix

* useless annotations begone

---------

Co-authored-by: EmoGarbage404 <retron404@gmail.com>

Content.Shared/EntityEffects/Effects/CreateGas.cs

@@ -0,0 +1,32 @@
+using Content.Shared.Atmos;
+using Content.Shared.Atmos.EntitySystems;
+using Content.Shared.Database;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.EntityEffects.Effects;
+
+public sealed partial class CreateGas : EventEntityEffect<CreateGas>
+{
+    [DataField(required: true)]
+    public Gas Gas = default!;
+
+    /// <summary>
+    ///     For each unit consumed, how many moles of gas should be created?
+    /// </summary>
+    [DataField]
+    public float Multiplier = 3f;
+
+    public override bool ShouldLog => true;
+    protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys)
+    {
+        var atmos = entSys.GetEntitySystem<SharedAtmosphereSystem>();
+        var gasProto = atmos.GetGas(Gas);
+
+        return Loc.GetString("reagent-effect-guidebook-create-gas",
+            ("chance", Probability),
+            ("moles", Multiplier),
+            ("gas", gasProto.Name));
+    }
+
+    public override LogImpact LogImpact => LogImpact.High;
+}