Restructure item nesting for typescript interface

[sansmoraxz]

I was doing some analysis of the data. Observed some issues in the typescript dtype file.

• I have seen duplicate fields viz. sprint, sprintspeed.
• Some fields are marked optional in base where it could've been nested into the sub interface and marked non-optional, viz. multishot is gun specific although it's there in Weapon
• Some fields don't have any references anywhere in data viz. secondsPerShot. Perhaps they have been deprecated.

Perhaps this should be entirely rearchitected.

[TobiTenno]

most of the types are dependent (especially for the fields you're mentioning) from wiki data which have changed drastically over time, and we have no confidence they won't again, as they're from an abstract upstream

[TobiTenno]

if you want to try your hand at simplifying and cleaning it up, feel free. i believe multishot also exists on gun-swords (just as an aside)