Adds a CL-exclusive pistol, the ES-4.

[NewyearnewmeUwu]

About the pull request

This PR adds a CL- and therefore WY - exclusive pistol. The ES-4 is a Weyland Corp manufactures less-lethal pistol that's essentially a reskin of the 88 mod 4 that only fires less-lethal projectiles. Sprites by the fantastic @thwompa

Explain why it's good for the game

The pistol uses distinct blue muzzle flashes for its firing so that it's easier to distinguish it from normal guns, and it comes straight from the Aliens RPG. It also looks cool and makes it harder for the CL to get a lethal firearm straight off the bat.

Testing Photographs and Procedure

Screenshots & Videos

Put screenshots and videos here with an empty line between the screenshots and the <details> tags.

Changelog

🆑
add: Added the ES-4 electrostatic pistol to the CL's safe.
/:cl:

[thwompa]

lets gooo!!!!

[MusselMain]

seems like a weapon that will fit ML better, allowing CL to be armed shipside, but making sense lore wise. As it wouldn't make sense for civilians aboard a military vessel to be armed unless deploying or on code blue/red, but since CL is a fairly important individual in the ship's crew, having something to stop a rogue marine who despises WY from harming them, without risk of causing big legal issues between WY and USCM.

[harryob]

code looks fine

[github-actions]

This PR has been inactive for long enough to be automatically marked as stale. This means it is at risk of being auto closed in ~ 7 days, please address any outstanding review items and ensure your PR is finished, if these are all true and you are auto-staled anyway, you need to actively ask maintainers if your PR will be merged. Once you have done any of the previous actions then you should request a maintainer remove the stale label on your PR, to reset the stale timer. If you feel no maintainer will respond in that time, you may wish to close this PR youself, while you seek maintainer comment, as you will then be able to reopen the PR yourself

[FransFeiffer]

Sprites are fine, LGTM

[cm13live]

This pull request has been mentioned on CM-SS13. Please provide feedback here:

https://forum.cm-ss13.com/t/weapon-restrictions-in-sop/2387/16