Move remnants of db.py to config.py.

This is now just a few prices and income configurations. Both should
probably be defined in YAML but for now this makes the name "db" usable
again.

game/config.py

@@ -0,0 +1,21 @@
+# This should probably be much higher, but the AI doesn't rollover their budget
+# and isn't smart enough to save to repair a critical runway anyway, so it has
+# to be cheap enough to repair with a single turn's income.
+RUNWAY_REPAIR_COST = 100
+
+REWARDS = {
+    "power": 4,
+    "warehouse": 2,
+    "ware": 2,
+    "fuel": 2,
+    "ammo": 2,
+    "farp": 1,
+    # TODO: Should generate no cash once they generate units.
+    # https://github.com/dcs-liberation/dcs_liberation/issues/1036
+    "factory": 10,
+    "comms": 10,
+    "oil": 10,
+    "derrick": 8,
+    "village": 0.25,
+    "allycamp": 0.5,
+}