Fix "bow" gunmod location not working

[Coolthulhu]

Also add warning in strict json mode

Summary

SUMMARY: Bugfixes "Fix 'bow' gunmod location not working"

Purpose of change

Fix #1526

Describe the solution

When a gun has skill type "archery", allow gunmods with "bow" as gun type as well.

Added a warning, currently only in strict mode, that "bow" is deprecated. All modders should have strict mode on for warnings like this.
Changed existing entries from "bow" to "archery".

Describe alternatives you've considered

Rewriting the hacky gunmod location thing to be properly verified and strongly typed.
While this would be a good idea, it would take extra work, then again even more to maintain compatibility with mods.

Dropping the "bow" location altogether and just printing warnings if neither skill nor item for the location exists.

Checking if there is at least one gun with given type which can receive this particular gunmod, warning if there isn't.

Testing

• Spawn recurve bow and arrow rest
• Activate arrow rest
• Should allow installing on bow
• Should install properly on confirm

Additional context