Rename ammunition box (.50), Liberation Station .50 stock

[K-Dynamic]

About the PR

• Renames ammo boxes; "shell box (X)" to "ammunition box (.50 X)"
• Adds .50 shells to Liberation Station vendor (six .50 pellet, three .50 practice)

Why / Balance

Shotgun ammo boxes now follow naming convetion of other ammo boxes. For example, "shell box (X)" is now "ammunition box (.50 X)." This means shotgun shell boxes will actually appear in the sec techfab when searching ammunition.

Added six .50 pellet boxes and three .50 practice boxes to the Liberation Vendor. Even if it's admeme or CC-only content, it's worth keeping inventory up to date.

Technical details

yml changes only

• Resources/Prototypes/Catalog/VendingMachines/Inventories/ammo.yml (added .50 pellet and practice rounds)
• Resources/Prototypes/Catalog/VendingMachines/Inventories/shotgun.yml (renamed shotgun ammunition boxes)

Media

Note: screenshot includes outdated 'buckshot' term, updated to 'pellet' by latest commit

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.

Breaking changes

Changelog

🆑

• tweak: Renamed "shell box (X)" to "ammunition box (.50 X)" to match existing naming scheme, and are thus easier to find in certain vendors and fabricators.

[slarticodefast]

in BaseMagazineShotgun this is called (.50 shells)
Not sure which one is technically correct, but it should be consistent

[K-Dynamic]

It's slightly complicated because .50 shells is a generic name, despite the fact we have .50 beanbags and .50 tranqs and so forth

I'm probably gonna rename all instances of .50 shells and ballistic ammo providers of .50 shells to pellets then

[K-Dynamic]

Depending on the response to #34284, I might rename all instances of ".50" to "12G"