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 :(

---------

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

Content.Server/Chemistry/ReagentEffects/AddToSolutionReaction.cs

@@ -1,6 +1,7 @@
 using Content.Server.Chemistry.EntitySystems;
 using Content.Shared.Chemistry.Reagent;
 using JetBrains.Annotations;
+using Robust.Shared.Prototypes;
 
 namespace Content.Server.Chemistry.ReagentEffects
 {
@@ -24,5 +25,8 @@ namespace Content.Server.Chemistry.ReagentEffects
                 .TryAddReagent(args.SolutionEntity, solutionContainer, args.Reagent.ID, args.Quantity, out var accepted))
                 args.Source?.RemoveReagent(args.Reagent.ID, accepted);
         }
+
+        protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys) =>
+            Loc.GetString("reagent-effect-guidebook-missing", ("chance", Probability));
     }
 }