This exports all the old AIRFIELD_DATA to yaml files. It's easier for
users to send fixes if it's defined this way, and they can also fix it
in their install without having to wait for a new release.
This also switches the indexes from the unstable DCS airfield names to
airfield IDs, so this fixes another case of DCS updates occasionally
breaking Liberation.
I also ended up finding quite a few typos in airfield names, and
incorrect theater names in the process. Those have been fixed.
* Use TACAN channels more selectively
* Increase tacan range to 126
* Use pytest and add workflow
* Skip faction tests due to outdated test data
* Run mypy on tests directory also
* Use iterators for bands AND usages, add tests
