30 minute grace period to respawn (world time, not round time) (#3457)

## About The Pull Request
from when the server starts to 30 minutes after, respawning is free of
charge
## Why It's Good For The Game
item #1 on the list
## Proof Of Testing
it works dude trust me
<details>
<summary>Screenshots/Videos</summary>

</details>

## Changelog
🆑
code: respawn enabled until 30 min (world time)
/🆑

code/modules/mob/mob.dm

@@ -845,6 +845,11 @@
 /mob/proc/check_respawn_delay(override_delay = 0)
 	if(!override_delay && !CONFIG_GET(number/respawn_delay))
 		return TRUE
+	//BUBBER EDIT 30 minute grace period
+	var/respawn_grace_period = CONFIG_GET(number/respawn_grace_period)
+	if(world.time < respawn_grace_period)
+		return TRUE
+	//BUBBER EDIT END
 
 	var/death_time = world.time - persistent_client.time_of_death
 

config/bubbers/bubbers_config.txt

@@ -16,3 +16,6 @@ INTERN_THRESHOLD_COMMAND 20
 # Vetted player system
 ## If enabled, it will use checks to determine if a player is vetted or not in different parts of the game
 #CHECK_VETTED
+
+## Respawn grace period (deciseconds), which allows to return to the lobby some amount of time after the world loads - default 30 minutes
+RESPAWN_GRACE_PERIOD 18000

modular_zubbers/code/controllers/configuration/general.dm

@@ -0,0 +1,2 @@
+/datum/config_entry/number/respawn_grace_period
+	default = 30 MINUTES

tgstation.dme

@@ -8781,6 +8781,7 @@
 #include "modular_zubbers\code\_globalvars\lists\quirks.dm"
 #include "modular_zubbers\code\_globalvars\lists\~maintenance_loot.dm"
 #include "modular_zubbers\code\_onclick\hud\screen_objects\hud_timer.dm"
+#include "modular_zubbers\code\controllers\configuration\general.dm"
 #include "modular_zubbers\code\controllers\configuration\entries\nsfw.dm"
 #include "modular_zubbers\code\controllers\subsystem\air.dm"
 #include "modular_zubbers\code\controllers\subsystem\job.dm"