Export to SE4 mod data files, similar to the old templatizer

**What do you want to see?**
I'd like to add an option somewhere to export a FrEee mod to the SE4 format. This would entail:
* Generate individual records for parameterized records
* Evaluate static formulas
* Throw an error if there are dynamic formulas (since SE4 doesn't support those)
* Somehow handle weapon damage fields
* Insert missing numbers in field names and otherwize canonicalize them, e.g. convert "Ability Val" to "Ability 2 Val 1" or whatever

**How would it help players?**
Some folks want to make SE4 mods since FrEee isn't complete yet and it sure would be nice to be able to export!

**Alternatives**
???

**Screenshots and mockups**
???

**Things to consider**
* Where would this feature go? Maybe the mod loading screen?
* What about unsupported data files? Maybe treat all data files as "raw" data files without being concerned with templates?
* What do do about weapon damage fields? They need to take into account range and generate an array of 20 numbers. Limited dynamic formula support, perhaps? Or a new type of field?