Add procurement automation for players.

The allows the players to use the same auto-purchase mechanics that the
AI uses. The behavior is very bad, but it's no worse than what OPFOR
deals with.

There's a lot that needs to be improved before this is really a good
choice for the player:

* Option to adjust budget balance between front lines and airbases.
* Disallow negative budgets (which incidentally will cause more aircraft
  to be purchased, since the armor purchases currently accidentally
  spend the aircraft budget).
* Buy less randomly: https://github.com/Khopa/dcs_liberation/issues/361.
* Obey parking limits.
* Use the delivery events rather than instant delivery (also allows the
  player to cancel orders they don't want).

Fixes https://github.com/Khopa/dcs_liberation/issues/362

game/game.py

@@ -243,9 +243,9 @@ class Game:
             self,
             for_player=True,
             faction=self.player_faction,
-            manage_runways=False,
-            manage_front_line=False,
-            manage_aircraft=False
+            manage_runways=self.settings.automate_runway_repair,
+            manage_front_line=self.settings.automate_front_line_reinforcements,
+            manage_aircraft=self.settings.automate_aircraft_reinforcements
         ).spend_budget(self.budget)
 
         if not no_action and self.turn > 1:

game/settings.py

@@ -25,6 +25,11 @@ class Settings:
     player_income_multiplier: float = 1.0
     enemy_income_multiplier: float = 1.0
 
+    # Campaign management
+    automate_runway_repair: bool = False
+    automate_front_line_reinforcements: bool = False
+    automate_aircraft_reinforcements: bool = False
+
     # Performance oriented
     perf_red_alert_state: bool = True
     perf_smoke_gen: bool = True