Add plant phalanximine, fix slippery fruits (#19820)

Content.Server/Chemistry/ReagentEffects/PlantMetabolism/PlantPhalanximine.cs

@@ -0,0 +1,24 @@
+using Content.Server.Botany.Components;
+using Content.Shared.Chemistry.Reagent;
+using JetBrains.Annotations;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.Chemistry.ReagentEffects.PlantMetabolism
+{
+    [UsedImplicitly]
+    [DataDefinition]
+    public sealed partial class PlantPhalanximine : ReagentEffect
+    {
+        public override void Effect(ReagentEffectArgs args)
+        {
+            if (!args.EntityManager.TryGetComponent(args.SolutionEntity, out PlantHolderComponent? plantHolderComp)
+                                    || plantHolderComp.Seed == null || plantHolderComp.Dead ||
+                                    plantHolderComp.Seed.Immutable)
+                return;
+
+            plantHolderComp.Seed.Viable = true;
+        }
+
+        protected override string? ReagentEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys) => Loc.GetString("reagent-effect-guidebook-missing", ("chance", Probability));
+    }
+}