Webbing (and drop pouches) resprite (#21864)

It always bothered me how the webbings (is that a proper plural form for
them?) poked out from under suit items. But then I remembered that I am
a spriter (allegedly) and can change that, so I did. Hello.

From the changelog:
> - imageadd: "Resprited engineering, medical and security webbings
(which are now thinner to not poke out from under suit clothing) and
drop pouches."
> - imageadd: "Added a proper colorable sprite for the colorable drop
pouches."

Images, as always, in the details below.
Old (current) sprites on the top, new on the bottom unless stated
otherwise.
<details>
<summary> Webbings: </summary>
<img width="2304" height="1536" alt="webbings"
src="https://github.com/user-attachments/assets/03942dff-2deb-4071-992d-f42531d753cb"
/>

</details>

<details>
<summary> Drop pouches: </summary>
<img width="2304" height="1536" alt="drop"
src="https://github.com/user-attachments/assets/8ab8f5f7-2f29-4cc7-babb-e845b9ee1d44"
/>

</details>

As far as attributions go, I referenced the medical webbing from
Shiptest, and modified it for for engineering, security and medical. I
do not know which PR in particular that webbing was added added in, but
I will link the PR which I _believe_ did it:
https://github.com/shiptest-ss13/Shiptest/pull/2748

code/modules/clothing/under/accessories/storage.dm

@@ -178,6 +178,7 @@
 
 /obj/item/clothing/accessory/storage/pouches/colour
 	icon_state = "thigh_colour"
+	item_state = "thigh_colour"
 
 /obj/item/clothing/accessory/storage/knifeharness
 	name = "decorated harness"

html/changelogs/ElorgRHG-webbing-(and-drop-pouches)-resprite-and-thinning.yml

@@ -0,0 +1,14 @@
+# Your name.
+author: ElorgRHG
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, this gets changed to [] after reading.  Just remove the brackets when you add new shit.
+# Please surround your changes in  double quotes ("). It works without them, but if you use certain characters it screws up compiling. The quotes will not show up in the changelog.
+changes:
+  - imageadd: "Resprited engineering, medical and security webbings (which are now thinner to not poke out from under suit clothing) and drop pouches."
+  - imageadd: "Added a proper colorable sprite for the colorable drop pouches."