Adds 2 new barsigns (#2412)

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## About The Pull Request

Adds two new barsigns


![barsign](https://github.com/shiptest-ss13/Shiptest/assets/58402542/ed29ed11-07b3-4af1-beb4-6d9b1207a1a0)

## Why It's Good For The Game


![image](https://github.com/shiptest-ss13/Shiptest/assets/58402542/3b4eb719-f6fa-4f0f-9698-915720c1d8f9)


![image-1](https://github.com/shiptest-ss13/Shiptest/assets/58402542/339e1a7f-4bca-433f-92b9-7909fe8fcb8c)

## Changelog

:cl:
add: Two new barsigns
/:cl:

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code/game/objects/structures/barsigns.dm

@@ -297,6 +297,16 @@
 	icon = "goose"
 	desc = "Drink till you puke and/or break the laws of reality!"
 
+/datum/barsign/dustydunesaloon
+	name = "Dusty Dune Saloon"
+	icon = "saloon"
+	desc = "The perfect place to get trashed then get killed in a shootout"
+
+/datum/barsign/birdsnest
+	name = "Bird's Nest ♡"
+	icon = "birdsnest"
+	desc = "It is NOT what you're thinking it is."
+
 /datum/barsign/hiddensigns
 	hidden = TRUE