Adds a station trait that brightens up IceBox's surface. (#82945)

## About The Pull Request
This PR adds a positive trait that brings lights to the outdoors surface
areas of Icebox.

## Why It's Good For The Game
Building upon the features of the station traits. This is how it'd look:
![It's Always Sunny On
IceBoxStation](https://github.com/tgstation/tgstation/assets/42542238/af4238e9-c731-41c9-9eaf-8fcb04d6fe4f)

## Changelog
:cl:
add: Adds an Icebox-specific station trait that brightens outdoors areas
on the surface level.
/:cl:

code/__DEFINES/traits/declarations.dm

@@ -950,6 +950,7 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 #define STATION_TRAIT_BIGGER_PODS "station_trait_bigger_pods"
 #define STATION_TRAIT_BIRTHDAY "station_trait_birthday"
 #define STATION_TRAIT_BOTS_GLITCHED "station_trait_bot_glitch"
+#define STATION_TRAIT_BRIGHT_DAY "station_trait_bright_day"
 #define STATION_TRAIT_CARP_INFESTATION "station_trait_carp_infestation"
 #define STATION_TRAIT_CYBERNETIC_REVOLUTION "station_trait_cybernetic_revolution"
 #define STATION_TRAIT_EMPTY_MAINT "station_trait_empty_maint"

code/_globalvars/traits/_traits.dm

@@ -79,6 +79,7 @@ GLOBAL_LIST_INIT(traits_by_type, list(
 		"STATION_TRAIT_BIGGER_PODS" = STATION_TRAIT_BIGGER_PODS,
 		"STATION_TRAIT_BIRTHDAY" = STATION_TRAIT_BIRTHDAY,
 		"STATION_TRAIT_BOTS_GLITCHED" = STATION_TRAIT_BOTS_GLITCHED,
+		"STATION_TRAIT_BRIGHT_DAY" = STATION_TRAIT_BRIGHT_DAY,
 		"STATION_TRAIT_CARP_INFESTATION" = STATION_TRAIT_CARP_INFESTATION,
 		"STATION_TRAIT_CYBERNETIC_REVOLUTION" = STATION_TRAIT_CYBERNETIC_REVOLUTION,
 		"STATION_TRAIT_EMPTY_MAINT" = STATION_TRAIT_EMPTY_MAINT,

code/datums/station_traits/positive_traits.dm

@@ -292,6 +292,15 @@
 	weight_multiplier = 3
 	max_occurrences_modifier = 10 //lotta cows
 
+/datum/station_trait/bright_day
+	name = "Bright Day"
+	report_message = "The stars shine bright and the clouds are scarcer than usual. It's a bright day here on the Ice Moon's surface."
+	trait_type = STATION_TRAIT_POSITIVE
+	weight = 5
+	show_in_report = TRUE
+	trait_flags = STATION_TRAIT_PLANETARY
+	trait_to_give = STATION_TRAIT_BRIGHT_DAY
+
 /datum/station_trait/shuttle_sale
 	name = "Shuttle Firesale"
 	report_message = "The Nanotrasen Emergency Dispatch team is celebrating a record number of shuttle calls in the recent quarter. Some of your emergency shuttle options have been discounted!"

code/game/area/areas/mining.dm

@@ -209,6 +209,11 @@
 	name = "Icemoon Wastes"
 	outdoors = TRUE
 
+/area/icemoon/surface/outdoors/Initialize(mapload)
+	if(HAS_TRAIT(SSstation, STATION_TRAIT_BRIGHT_DAY))
+		base_lighting_alpha = 145
+	return ..()
+
 /area/icemoon/surface/outdoors/nospawn // this is the area you use for stuff to not spawn, but if you still want weather.
 
 /area/icemoon/surface/outdoors/nospawn/New() // unless you roll forested trait lol