LoW The Chief Must Die: replace Formula AI with Micro AI

Formula AI is not maintained any more and will be removed in the future.  This replaces the Patrol FAI use in this scenario with a Patrol Micro AI.

Note that the FAI guard_radius=3 is equivalent to the MAI attack_range=4 as the former is the distance to the hex from which the patrol attacks, while the latter is the distance to the enemy.

data/campaigns/Legend_of_Wesmere/scenarios/chapter4/16_The_Chief_Must_Die.cfg

@@ -247,8 +247,8 @@
         faction=Custom
         [ai]
             [stage]
-                engine=fai
-                name=unit_formulas
+                id=main_loop
+                name=ai_default_rca::candidate_action_evaluation_loop
             [/stage]
         [/ai]
     [/side]
@@ -279,95 +279,119 @@
             name=_ "Odrun"
             side=7
             x,y=25,4
-            [ai]
-                loop_formula="{ai/formula/patrol.fai}"
-                [vars]
-                    guard_radius=3
-                    waypoints=[ loc(25,4) -> loc(14,2), loc(14,2) -> loc(9,12), loc(9,12) -> loc(6,19), loc(6,19) -> loc(25,4) ]
-                    next_step="loc(25,4)"
-                [/vars]
-            [/ai]
         [/unit]
+        [micro_ai]
+            side=7
+            ai_type=patrol
+            action=add
+            [filter]
+                id=Odrun
+            [/filter]
+            waypoint_x=14,9,6,25
+            waypoint_y=2,12,19,4
+            attack_range=4
+            attack_invisible_enemies=yes
+        [/micro_ai]
 
         [unit]
             type=Goblin Pillager
             id=Kardur
             name=_ "Kardur"
             side=7
             x,y=10,20
-            [ai]
-                loop_formula="{ai/formula/patrol.fai}"
-                [vars]
-                    guard_radius=3
-                    waypoints=[ loc(10,20) -> loc(18,24), loc(18,24) -> loc(21,19), loc(21,19) -> loc(18,11), loc(18,11) -> loc(10,20) ]
-                    next_step="loc(10,20)"
-                [/vars]
-            [/ai]
         [/unit]
+        [micro_ai]
+            side=7
+            ai_type=patrol
+            action=add
+            [filter]
+                id=Kardur
+            [/filter]
+            waypoint_x=18,21,18,10
+            waypoint_y=24,19,11,20
+            attack_range=4
+            attack_invisible_enemies=yes
+        [/micro_ai]
 
         [unit]
             type=Goblin Pillager
             id=Kartrog
             name=_ "Kartrog"
             side=7
             x,y=22,27
-            [ai]
-                loop_formula="{ai/formula/patrol.fai}"
-                [vars]
-                    guard_radius=3
-                    waypoints=[ loc(22,27) -> loc(27,24), loc(27,24) -> loc(21,16),loc(21,16) -> loc(22,27), loc(22,27) -> loc(6,24), loc(6,24)-> loc(22,27)]
-                    next_step="loc(22,27)"
-                [/vars]
-            [/ai]
         [/unit]
+        [micro_ai]
+            side=7
+            ai_type=patrol
+            action=add
+            [filter]
+                id=Kartrog
+            [/filter]
+            waypoint_x=27,21,22,6,22
+            waypoint_y=24,16,27,24,27
+            attack_range=4
+            attack_invisible_enemies=yes
+        [/micro_ai]
 
         [unit]
             type=Goblin Knight
             id=Sdrul
             name=_ "Sdrul"
             side=7
             x,y=13,19
-            [ai]
-                loop_formula="{ai/formula/patrol.fai}"
-                [vars]
-                    guard_radius=3
-                    waypoints=[ loc(13,19) -> loc(16,15), loc(16,15) -> loc(25,4), loc(25,4) -> loc(13,19) ]
-                    next_step="loc(13,19)"
-                [/vars]
-            [/ai]
         [/unit]
+        [micro_ai]
+            side=7
+            ai_type=patrol
+            action=add
+            [filter]
+                id=Sdrul
+            [/filter]
+            waypoint_x=16,25,13
+            waypoint_y=15,4,19
+            attack_range=4
+            attack_invisible_enemies=yes
+        [/micro_ai]
 
         [unit]
             type=Direwolf Rider
             id=Utrub
             name=_ "Utrub"
             side=7
             x,y=29,24
-            [ai]
-                loop_formula="{ai/formula/patrol.fai}"
-                [vars]
-                    guard_radius=3
-                    waypoints=[ loc(29,24) -> loc(16,15), loc(16,15) -> loc(29,24) ]
-                    next_step="loc(29,24)"
-                [/vars]
-            [/ai]
         [/unit]
+        [micro_ai]
+            side=7
+            ai_type=patrol
+            action=add
+            [filter]
+                id=Utrub
+            [/filter]
+            waypoint_x=16,29
+            waypoint_y=15,24
+            attack_range=4
+            attack_invisible_enemies=yes
+        [/micro_ai]
 
         [unit]
             type=Goblin Knight
             id=Uhmit
             name=_ "Uhmit"
             side=7
             x,y=17,8
-            [ai]
-                loop_formula="{ai/formula/patrol.fai}"
-                [vars]
-                    guard_radius=3
-                    waypoints=[ loc(25,4) -> loc(16,15), loc(16,15) -> loc(25,4) ]
-                    next_step="loc(17,8)"
-                [/vars]
-            [/ai]
         [/unit]
+        [micro_ai]
+            side=7
+            ai_type=patrol
+            action=add
+            [filter]
+                id=Uhmit
+            [/filter]
+            waypoint_x=25,16,17
+            waypoint_y=4,15,8
+            attack_range=4
+            attack_invisible_enemies=yes
+        [/micro_ai]
 
         #### end of wolves ####