Occupations: Refactor all occupation defs into separate Lua files.

Add WIP priest occupation.
Add WIP (very WIP) farmer occupation.

data/occupations/default_farmer.lua

@@ -0,0 +1,73 @@
+----------------------------------------------------
+-- Test farmer occupation for Advanced NPC
+-- By Zorman2000
+----------------------------------------------------
+-- This farmer implementation is still WIP. It is supposed to spawn
+-- on buildings that have plots or there are fields nearby. Also, it
+-- work on its crops during the morning, and sell some of them on the
+-- afternoon.
+
+local farmer_def = {
+    dialogues = {},
+    textures = {},
+    initial_inventory = {},
+    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"
+                        }
+                    },
+                }
+            }
+        }
+    }
+}
+
+-- Register occupation
+npc.occupations.register_occupation("test_farmer", farmer_def)