Botany composting & shovel/spade (or, make botany sustainable) (#3064)

* Botany: Introduce shovel and spade into hydro\_tools

* Botany: Add shovel/spade (just removes plants)

* Botany: Add shovel/spade lathe recipes and make all botany lathe recipes accessible

* Botany: Add spade into Saltern

* Botany: Give Saltern a bucket for the botanist

* Botany: Plant produce can be composted for nutriment/etc.

* Botany: Bye-bye duplicated force update code, hello ForceUpdateByExternalCause

* Botany: Shovel identity crisis resolved (thanks Paul)

Content.Server/GameObjects/Components/Botany/PlantHolderComponent.cs

@@ -639,6 +639,13 @@ namespace Content.Server.GameObjects.Components.Botany
                 Seed = Seed.Diverge(modified);
         }
 
+        private void ForceUpdateByExternalCause()
+        {
+            SkipAging++; // We're forcing an update cycle, so one age hasn't passed.
+            ForceUpdate = true;
+            Update();
+        }
+
         public async Task<bool> InteractUsing(InteractUsingEventArgs eventArgs)
         {
             var user = eventArgs.User;
@@ -695,6 +702,22 @@ namespace Content.Server.GameObjects.Components.Botany
                 return true;
             }
 
+            if (usingItem.HasComponent<ShovelComponent>())
+            {
+                if (Seed != null)
+                {
+                    user.PopupMessageCursor(Loc.GetString("You remove the plant from the {0}.", Owner.Name));
+                    user.PopupMessageOtherClients(Loc.GetString("{0} removes the plant.", user.Name));
+                    RemovePlant();
+                }
+                else
+                {
+                    user.PopupMessageCursor(Loc.GetString("There is no plant to remove."));
+                }
+
+                return true;
+            }
+
             if (usingItem.TryGetComponent(out SolutionContainerComponent? solution) && solution.CanRemoveSolutions)
             {
                 var amount = 5f;
@@ -715,9 +738,7 @@ namespace Content.Server.GameObjects.Components.Botany
 
                 _solutionContainer?.TryAddSolution(split);
 
-                SkipAging++; // We're forcing an update cycle, so one age hasn't passed.
-                ForceUpdate = true;
-                Update();
+                ForceUpdateByExternalCause();
 
                 return true;
             }
@@ -752,9 +773,7 @@ namespace Content.Server.GameObjects.Components.Botany
 
                 // Just in case.
                 CheckLevelSanity();
-                SkipAging++; // We're forcing an update cycle, so one age hasn't passed.
-                ForceUpdate = true;
-                Update();
+                ForceUpdateByExternalCause();
 
                 return true;
             }
@@ -764,6 +783,24 @@ namespace Content.Server.GameObjects.Components.Botany
                 return DoHarvest(user);
             }
 
+            if (usingItem.HasComponent<ProduceComponent>())
+            {
+                user.PopupMessageCursor(Loc.GetString("You compost {1:theName} into {0:theName}.", Owner, usingItem));
+                user.PopupMessageOtherClients(Loc.GetString("{0:TheName} composts {1:theName} into {2:theName}.", user, usingItem, Owner));
+
+                if (usingItem.TryGetComponent(out SolutionContainerComponent? solution2))
+                {
+                    // This deliberately discards overfill.
+                    _solutionContainer?.TryAddSolution(solution2.SplitSolution(solution2.Solution.TotalVolume));
+
+                    ForceUpdateByExternalCause();
+                }
+
+                usingItem.Delete();
+
+                return true;
+            }
+
             return false;
         }
 

Content.Server/GameObjects/Components/Botany/ShovelComponent.cs

@@ -0,0 +1,11 @@
+#nullable enable
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.GameObjects.Components.Botany
+{
+    [RegisterComponent]
+    public class ShovelComponent : Component
+    {
+        public override string Name => "Shovel";
+    }
+}