Adds weather to the exoplanets (#18855)

This pr adds weather to some exoplanets:
-snow exoplanets, including adhomai, can go from calm to light snow,
medium snow, and heavy snow
-jungle planets, including konyang, can go from calm to light rain,
regular rain, and storm
-lava planets can go from calm to ash

---------

Co-authored-by: Matt Atlas <mattiathebest2000@hotmail.it>
Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/modules/maps/planet_types/jungle.dm

@@ -10,6 +10,7 @@
 	flora_diversity = 7
 	has_trees = TRUE
 	possible_themes = list(/datum/exoplanet_theme/jungle)
+	initial_weather_state = /singleton/state/weather/rain/storm/jungle_planet
 	ruin_planet_type = PLANET_GROVE
 	ruin_allowed_tags = RUIN_LOWPOP|RUIN_SCIENCE|RUIN_HOSTILE|RUIN_WRECK|RUIN_NATURAL
 

code/modules/maps/planet_types/lava.dm

@@ -7,6 +7,7 @@
 	weather = "Global sub-atmospheric volcanic ambient weather system. Exercise extreme caution with unpredictable volcanic eruption"
 	surfacewater = "Majority superheated methane, silicon and metallic substances, 7% liquid surface area."
 	planetary_area = /area/exoplanet/lava
+	initial_weather_state = /singleton/state/weather/calm/lava_planet
 	rock_colors = list(COLOR_DARK_GRAY)
 	possible_themes = list(/datum/exoplanet_theme/volcanic)
 	features_budget = 4

code/modules/maps/planet_types/lore/konyang.dm

@@ -7,6 +7,7 @@
 	icon_state = "globe2"
 	color = "#68e968"
 	planetary_area = /area/exoplanet/grass/konyang
+	initial_weather_state = /singleton/state/weather/rain/storm/jungle_planet
 	scanimage = "konyang.png"
 	massvolume = "0.89/0.99"
 	surfacegravity = "0.93"

code/modules/maps/planet_types/lore/srandmarr.dm

@@ -128,6 +128,7 @@
 	icon_state = "globe2"
 	color = "#b5dfeb"
 	planetary_area = /area/exoplanet/adhomai
+	initial_weather_state = /singleton/state/weather/calm/snow_planet
 	scanimage = "adhomai.png"
 	massvolume = "0.86/0.98"
 	surfacegravity = "0.80"
@@ -186,6 +187,7 @@
 			features_budget = 1
 			possible_themes = list(/datum/exoplanet_theme/snow/tundra/adhomai)
 			ruin_type_whitelist = list (/datum/map_template/ruin/exoplanet/north_pole_monolith, /datum/map_template/ruin/exoplanet/north_pole_nka_expedition, /datum/map_template/ruin/exoplanet/north_pole_worm)
+			initial_weather_state = /singleton/state/weather/calm/arctic_planet
 
 	desc += " The landing sites are located at the [landing_faction]'s territory."
 

code/modules/maps/planet_types/snow.dm

@@ -6,6 +6,7 @@
 	geology = "Non-existent tectonic activity, minimal geothermal signature"
 	weather = "Global full-atmosphere hydrological weather system. Barely-habitable ambient low temperatures. Frequently dangerous, unpredictable meteorological upsets"
 	surfacewater = "Majority frozen, 70% surface water"
+	initial_weather_state = /singleton/state/weather/calm/snow_planet
 	planetary_area = /area/exoplanet/snow
 	flora_diversity = 4
 	has_trees = TRUE