Smol botany update (#9068)

* Smol botany update

- Adds the botany belt, capable of holding botany related tools, beakers & bottles as well as the floral somatoray
- Gives spades the ability to dig up plants so we don't have to go full texas chainsaw massacre on them whenever we want to remove one
- Adds botany belts to biogenerators
- Adds 2 and 3 spades to xenobotany and botany, respectively

* Update tray.dm

code/game/objects/items/weapons/storage/belt.dm

@@ -464,3 +464,21 @@
 	can_hold = list(
 		/obj/item/ammo_casing/afoam_dart
 		)
+
+/obj/item/storage/belt/plant
+	name = "botany toolbelt"
+	desc = "A belt to hold various botanical tools."
+	icon_state = "plantbelt"
+	storage_slots = 8
+	can_hold = list(
+		/obj/item/reagent_containers/glass/bottle,
+		/obj/item/reagent_containers/glass/beaker,
+		/obj/item/material/minihoe,
+		/obj/item/shovel/spade,
+		/obj/item/material/knife/machete/hatchet,
+		/obj/item/analyzer/plant_analyzer,
+		/obj/item/gun/energy/floragun,
+		/obj/item/tool/wirecutters,
+		/obj/item/tool/wrench,
+		/obj/item/multitool,
+	)