feat(content): shoulder holsters

[Relgar]

Purpose of change

Adds the ability to create and find shoulder holsters like a cool 90s cop and/or super spy.

Describe the solution

You can make a holster that sits under your arm. Copied mostly from the existing holster item with some caveats:

• I tried to make it so that we make use of existing items in the game - you can craft a shoulder holster from a normal holster, some standard sewing filament (10), and a shoulder strap.
• Volume, weight and cost are all increased to account for the inclusion of the shoulder strap.
• Moved to the strapped layer instead of waist, compact and oversize are preserved so mutants can make these and it doesn't interfere with other strapped arm armor.
• Added to the accessory_weaponcarry so every zombie has a chance to have this (less chances than a normal holster), also added to the pawnshop and drugdealer item distribution groups, which is where you can find normal holsters. Also added these to the zombie cop death drops. Did not add these to military zombies, they have holsters put in with a 100% rate, so this might be overkill.

Describe alternatives you've considered

This is too cool not to have in the game.

Testing

• Debugged a character in, can be crafted
• Killed some mobs, can be found.

Additional context

Reviewers - may need to your assistance to make sure I've put in the correct values for distribution, not too familiar with those jsons.

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[Relgar]

PS. seems to be something about #3975 in the automated change for some reason.

[Relgar]

Now that I've had a think about it I'm wondering if it's better thematically to have it strapped with compact flag so it doesn't affect other commonly strapped arm armor

[chaosvolt]

Now that I've had a think about it I'm wondering if it's better thematically to have it strapped with compact flag so it doesn't affect other commonly strapped arm armor

Reasonable ye, consistent with stuff like back holsters having compact to avoid clashing with backpacks since balance-wise it undermines their utility.

[Admiral-Daala1541]

If we could keep both flags thatd be preferable tbh. If only because mutants not being able to craft one in their size doesnt make a whole lot of sense.

[Relgar]

That's a reasonable position - I'll keep it to strapped, compact (so it doesn't interfere with other strapped items), and oversize (so mutants can wear it).

[chaosvolt]

:3