Store registered plant on namespace

Handy for when modders want to use these definitions to extend or add to the mod

mods/farming/api.lua

@@ -1,6 +1,8 @@
 
 -- Wear out hoes, place soil
 -- TODO Ignore group:flower
+farming.registered_plants = {}
+
 farming.hoe_on_use = function(itemstack, user, pointed_thing, uses)
 	local pt = pointed_thing
 	-- check if pointing at a node
@@ -263,6 +265,8 @@ farming.register_plant = function(name, def)
 		def.fertility = {}
 	end
 
+	farming.registered_plants[pname] = def
+
 	-- Register seed
 	local lbm_nodes = {mname .. ":seed_" .. pname}
 	local g = {seed = 1, snappy = 3, attached_node = 1}