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)

Resources/Prototypes/Entities/Constructible/Power/lathe.yml

@@ -77,6 +77,11 @@
       - CableStack
       - Crowbar
       - Multitool
+      - MiniHoe
+      - Scythe
+      - Hatchet
+      - Shovel
+      - Spade
   - type: Appearance
     visuals:
     - type: AutolatheVisualizer

Resources/Prototypes/Entities/Objects/Tools/botany_tools.yml

@@ -98,3 +98,32 @@
     - type: MeleeWeapon
     - type: BotanySharp
     - type: Item
+
+- type: entity
+  name: spade
+  parent: BaseItem
+  id: Spade
+  description: A small tool for digging and moving dirt.
+  components:
+    - type: Sprite
+      sprite: Constructible/Hydroponics/hydro_tools.rsi
+      state: spade
+    - type: ItemCooldown
+    - type: MeleeWeapon
+    - type: Shovel
+    - type: Item
+
+- type: entity
+  name: shovel
+  parent: BaseItem
+  id: Shovel
+  description: A large tool for digging and moving dirt.
+  components:
+    - type: Sprite
+      sprite: Constructible/Hydroponics/hydro_tools.rsi
+      state: shovel
+    - type: ItemCooldown
+    - type: MeleeWeapon
+    - type: Shovel
+    - type: Item
+