Glasses Transparency Tweaks (#2711)

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## About The Pull Request

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Resurrects #2595 from
stale hell, with the requested adjustments.

From the original PR: Changes the sprites of the prescription glasses,
and prescription HUD glasses, to be more transparent with less varying
colors. Also a semi port of
yogstation13/Yogstation#19641

Additionally, brings over the thin prescription glasses from
tgstation/tgstation#62145

![take a closer look at those
peepers](https://github.com/shiptest-ss13/Shiptest/assets/86762641/20f3b4dc-d00c-4dca-8b60-fe3ac1cd20fc)
## Why It's Good For The Game

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benefit the game. If you can't justify it in words, it might not be
worth adding. -->
I don't know about you, but I'd like to not have my character's eyes
locked behind the eternal damnation that is mandatory opaque glasses. As
the original author pointed out, it'll also help to make sunglasses huds
and prescription huds a bit more visually distinct from one another.

## Changelog

:cl:
add: new pair of prescription glasses, now available in loadouts!
imageadd: new transparent sprites for all prescription glasses
imageadd: new transparent sprites for all prescription HUDs
imageadd: new transparent sprite for the orange sunglasses
/:cl:

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code/modules/client/loadout/loadout_eyewear.dm

@@ -8,6 +8,10 @@
 	display_name = "glasses, prescription"
 	path = /obj/item/clothing/glasses/regular
 
+/datum/gear/eyewear/glasses/thin
+	display_name ="glasses, thin prescription"
+	path = /obj/item/clothing/glasses/regular/thin
+
 /datum/gear/eyewear/glasses/large
 	display_name = "glasses, large prescription"
 	path = /obj/item/clothing/glasses/regular/circle
@@ -16,6 +20,10 @@
 	display_name = "glasses, jamjar prescription"
 	path = /obj/item/clothing/glasses/regular/jamjar
 
+/datum/gear/eyewear/hipster_glasses
+	display_name = "glasses, hipster prescription"
+	path = /obj/item/clothing/glasses/regular/hipster
+
 //Misc
 /datum/gear/eyewear/eyepatch
 	display_name = "eyepatch"
@@ -38,9 +46,7 @@
 	description = "A blindfold you can still see through."
 	path = /obj/item/clothing/glasses/trickblindfold
 
-/datum/gear/eyewear/hipster_glasses
-	display_name = "Hipster Glasses"
-	path = /obj/item/clothing/glasses/regular/hipster
+
 
 /datum/gear/eyewear/glasses/cold
 	display_name = "cold goggles"

code/modules/clothing/glasses/_glasses.dm

@@ -213,6 +213,11 @@
 	icon_state = "circle_glasses"
 	item_state = "circle_glasses"
 
+/obj/item/clothing/glasses/regular/thin
+	name = "thin glasses"
+	desc = "More expensive, more fragile and much less practical, but oh so fashionable."
+	icon_state = "thin_glasses"
+
 //Here lies green glasses, so ugly they died. RIP
 
 /obj/item/clothing/glasses/sunglasses