Descriptions for .25 caseless (#36385)

Descriptions for .25 caseless (#36385)

* Initial commit: added descriptions to ammo boxes, cartridges, and magazines, and modified the cobra pistol's description.

* Updated magazine descriptions slightly

* Updated descriptions according to Roomba's feedback

* Minor updates

* Minor fixes

* Minor touch-up

* I should stop making tiny changes.

* Update Resources/Prototypes/Entities/Objects/Weapons/Guns/Pistols/pistols.yml

Co-authored-by: ArtisticRoomba <145879011+ArtisticRoomba@users.noreply.github.com>
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Co-authored-by: ArtisticRoomba <145879011+ArtisticRoomba@users.noreply.github.com>