Add Russian Roulette memories and moods events (#66051)

About The Pull Request

This adds memories to a nearby audience if someone is playing Russian Roulette with a loaded gun. The person who wins or loses also gains a positive or negative mood event that is long lasting. All of these events only trigger if the person playing is targeting a lethal area.
Why It's Good For The Game

Being able to add Russian Roulette to engravings would be pretty cool.
Changelog

cl
qol: Playing Russian Roulette with lethal intent now creates a mood event for the user and is engrained in any nearby peoples memories. The more bullets the better the memory and mood boost.
/cl

code/datums/mood_events/generic_negative_events.dm

@@ -374,3 +374,8 @@
 	description = "This is really embarrassing! I'm ashamed to pick up all these cards off the floor..."
 	mood_change = -3
 	timeout = 3 MINUTES
+
+/datum/mood_event/russian_roulette_lose
+	description = "I gambled my life and lost! I guess this is the end..."
+	mood_change = -20
+	timeout = 10 MINUTES

code/datums/mood_events/generic_positive_events.dm

@@ -297,3 +297,11 @@
 
 	mood_change *= card_players
 	return ..()
+
+/datum/mood_event/russian_roulette_win
+	description = "I gambled my life and won! I'm lucky to be alive..."
+	mood_change = 2
+	timeout = 5 MINUTES
+
+/datum/mood_event/russian_roulette_win/add_effects(loaded_rounds)
+	mood_change = 2 ** loaded_rounds