Chem guidebook (#17123)

* im good at atomizing. welcome to half-finished chem guides.

* wagh

* e

* save work

* aa

* woweee UI

* finishing the last of it

* don't actually update the engine :(

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Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>

Content.Server/Chemistry/ReagentEffects/PopupMessage.cs

@@ -1,6 +1,7 @@
 using Content.Shared.Chemistry.Reagent;
 using Content.Shared.Popups;
 using Robust.Shared.Player;
+using Robust.Shared.Prototypes;
 using Robust.Shared.Random;
 
 namespace Content.Server.Chemistry.ReagentEffects
@@ -16,6 +17,10 @@ namespace Content.Server.Chemistry.ReagentEffects
         [DataField("visualType")]
         public PopupType VisualType = PopupType.Small;
 
+        // JUSTIFICATION: This is purely cosmetic.
+        protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys)
+            => null;
+
         public override void Effect(ReagentEffectArgs args)
         {
             var popupSys = args.EntityManager.EntitySysManager.GetEntitySystem<SharedPopupSystem>();