More gun variants, part the third.

[DoctorBoomstick]

Summary

None

Purpose of change

Continues work started in #61598 and #61893, carrying on the inexorable march towards extending the variants system across more firearms which currently lack a more generic variation.

Describe the solution

I’ve created variants for all the weapons in .22 calibre, 7.62x25mm, 9x18mm, and 5.7x28mm. I’ve also slightly adjusted the existing variants present across the 5.7mm guns (the FN P90, Kel-Teck P50, and FN PS90), to make the names more compact and the descriptions less wordy. In doing these changes, many of the magazines have also been given appropriate variants were applicable.

Describe alternatives you've considered

No real alternatives to speak of, save for perhaps finding ways to cut down on the number of magazine variants.

Testing

All elements have been bug tested on the latest experimental builds, with the game loading just fine.

Additional context

Consult #61598 and #61893 for the first two parts to this expansion of the existing gun variants.

[TheShadowFerret]

Who dares bring British spellings to my American apocalypse

[bombasticSlacks]

This looks good to me, could you add the barrel lengths to the guns? #64961 gives an example.

wrong PR mb