Export current task priorities to aircraft yamls.

Nothing fancy. Rank in reversed (so earliest items in the original list
have the highest index) list * 10 (to leave gaps for balancing).

https://github.com/dcs-liberation/dcs_liberation/issues/2809

resources/units/aircraft/SpitfireLFMkIX.yaml

@@ -43,3 +43,15 @@ gunfighter: true
 variants:
   Spitfire LF Mk IX: {}
 kneeboard_units: "imperial"
+tasks:
+  BAI: 80
+  BARCAP: 80
+  CAS: 80
+  DEAD: 40
+  Escort: 80
+  Fighter sweep: 80
+  Intercept: 80
+  OCA/Aircraft: 80
+  OCA/Runway: 40
+  Strike: 40
+  TARCAP: 80