MiG-31BM by szcz mod support (#496)

* Add files via upload

* Add files via upload

* Update start_generator.py

* Update faction.py

* Update QNewGameWizard.py

* Update QGeneratorSettings.py

* Add files via upload

* Add files via upload

* Add files via upload

* Add files via upload

* Update MiG-31BM.lua

* Added SEAD Escort to MiG-31BM.yaml

* mig31bm.py fixed weapon injection

* Update mig31bm.py

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* Update faction.py

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* Update start_generator.py

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* Update __init__.py

* Update QGeneratorSettings.py

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* added support for MiG-31BM mod

* Commit changes which can't seem to be discarded...

* Remove (presumably) accidentally copied file

* Remove unused imports

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Co-authored-by: Raffson <Raffson@users.noreply.github.com>

resources/units/aircraft/MiG-31BM.yaml

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+description:
+  The MiG-31 is a heavy, long-range interceptor, with a maximum takeoff weight of 46,200 kilograms and a top speed exceeding 3,000 kilometers per hour. 
+  Designed to operate in all weather conditions at high altitudes, the aircraft was built to counter strategic bombers and cruise missiles. 
+  MiG-31s played critical roles in the defense networks of the Soviet Union and later Russia, particularly in Arctic and border patrol missions. 
+  Decades after its first flight in 1975, many of the over 500 units produced remain in service, continuing to be upgraded and fielded by the Russian Aerospace Forces.
+
+introduced: 1981
+manufacturer: Mikoyan-Gurevich/Mikoyan
+origin: USSR/Russia
+price: 24
+role: Interceptor
+max_range: 800
+variants:
+  MiG-31BM Foxhound: {}
+kneeboard_units: "metric"
+tasks:
+  BARCAP: 550
+  Escort: 400
+  Fighter sweep: 500
+  Intercept: 600
+  TARCAP: 450
+  SEAD: 150
+  SEAD Escort: 150