Occupations: Add schedule check function, allow enqueuing of schedule check.

Add simple test farmer occupation (WIP).

random_data/occupations_data.lua

@@ -0,0 +1,82 @@
+-- Occupations definitions
+
+-- Register default occupation
+npc.occupations.register_occupation("default_basic", npc.occupations.basic_def)
+
+-- Test farmer
+npc.occupations.register_occupation("test_farmer", {
+		dialogues = {},
+		textures = {},
+		initial_inventory = {},
+		workplace = {
+			search_nodes = {"cottages:gate_open","cottages:gate_closed"},
+			search_type = "orthogonal",
+			surrounding_nodes = 
+			{
+				bottom = {
+					nodes = {"farming:soil", "farming:wet_soil", "default:dirt", "default:dirt_with_grass"}, 
+					criteria = "any"
+				}
+				sides = {
+					nodes = {"doors:wooden_fence"}
+					criteria = "exact"
+				}
+			}
+		}
+		schedule_entries = {
+			[7] = {
+				[1] = 
+				{
+					task = npc.actions.cmd.WALK_TO_POS, 
+					args = {
+						end_pos = npc.places.PLACE_TYPE.OTHER.HOME_OUTSIDE, 
+						walkable = {}
+					}
+				},
+				[2] = 
+				{
+					check = true,
+					range = 2,
+					random_execution_times = true
+					min_count = 10,
+					max_count = 12,
+					nodes = {"farming:cotton_3"},
+					actions = 
+					{
+						-- Actions for grown cotton - harvest and replant
+						["farming:cotton_3"] = 
+						{
+							[1] = 
+							{
+								action = npc.actions.cmd.WALK_STEP,
+							},
+							[2] = 
+							{
+								action = npc.actions.cmd.DIG,
+							},
+							[3] = 
+							{
+								action = npc.actions.cmd.PLACE,
+								args = 
+								{
+									node = "farming:cotton_1"
+								}
+							}
+						}
+
+					},
+					none_actions = 
+					{
+						-- Walk a single step in a random direction
+						[1] = {
+								action = npc.actions.cmd.WALK_STEP, 
+								args = 
+								{
+									dir = "random"
+								} 
+						},
+					}
+				}
+			}
+		}
+	})