Maximum safe speeds on overmap hazards are now player-facing (#3880)

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## About The Pull Request

Now you don't have to code-dive to find out how to survive meteors

## Why It's Good For The Game

i think players should know this 

## Changelog

:cl:
add: Examining overmap hazards now shows their maximum safe speed, if
there is one, which there may not be.
/:cl:

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Signed-off-by: Theos <[email protected]>

code/modules/overmap/objects/event_datum.dm

@@ -67,6 +67,8 @@
 	token.color = "#a08444"
 	token.light_color = "#a08444"
 	token.update_appearance()
+	if(safe_speed)
+		token.desc += " You can safely navigate through this if your ship is travelling under [safe_speed] Gm/s."
 
 /datum/overmap/event/meteor/apply_effect()
 	for(var/datum/overmap/ship/controlled/Ship in get_nearby_overmap_objects())