[CLOSED PR] Kinetics improvements & magazines

[TDHooligan]

Don't want to give TDHooligan dev opinion whiplash but I am in favor of this PR.

i've shelved the magazine code til there's a consensus (IE, it still exists).

once there is consensus i can un-shelf it. right now the most debatable bit (ammo chambering & loose ammo) was a convenient add that sidesteps how projectiles are inferred from 'weapon.ammo' and technically keeps the code between magazine & non-magazine weapons closer to the original.

shelved code is in here. i haven't fixed up functionality for combining mags, nor reverse-reloading, but for testing:

Spawn "/obj/item/storage/belt/gun/pistol"

you can also emote *rack to manually rack the gun (for RP/gun nerds)

https://github.com/TDHooligan/goonstatio...netic-mags