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/AdjustReagent.cs

@@ -60,5 +60,27 @@ namespace Content.Server.Chemistry.ReagentEffects
                 }
             }
         }
+
+        protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys)
+        {
+            if (Reagent is not null && prototype.TryIndex(Reagent, out ReagentPrototype? reagentProto))
+            {
+                return Loc.GetString("reagent-effect-guidebook-adjust-reagent-reagent",
+                    ("chance", Probability),
+                    ("deltasign", MathF.Sign(Amount.Float())),
+                    ("reagent", reagentProto.LocalizedName),
+                    ("amount", MathF.Abs(Amount.Float())));
+            }
+            else if (Group is not null && prototype.TryIndex(Group, out MetabolismGroupPrototype? groupProto))
+            {
+                return Loc.GetString("reagent-effect-guidebook-adjust-reagent-group",
+                    ("chance", Probability),
+                    ("deltasign", MathF.Sign(Amount.Float())),
+                    ("group", groupProto.ID),
+                    ("amount", MathF.Abs(Amount.Float())));
+            }
+
+            throw new NotImplementedException();
+        }
     }
 }