Adds message boxes to the chat system (#22280)

* initial working commit

* fix this

* helpers

* tweaks

* text being silly moment

* antags are red

* Update goon/browserassets/css/browserOutput-dark.css

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>

* Update code/modules/mob/living/carbon/brain/robotic_brain.dm

Co-authored-by: Luc <89928798+lewcc@users.noreply.github.com>

* review and warning fixes

* refactor antag greetings

* tweaks to include more things

* Apply suggestions from code review

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>

* Update code/modules/antagonists/traitor/datum_mindslave.dm

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>

* fixes vial spawned antags

* Update code/datums/mind.dm

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

---------

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>
Co-authored-by: Luc <89928798+lewcc@users.noreply.github.com>
Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

code/controllers/subsystem/SSjobs.dm

@@ -431,7 +431,7 @@ SUBSYSTEM_DEF(jobs)
 
 		CreateMoneyAccount(H, rank, job)
 
-	var/list/L = list("<br><br><center><span class='green'>----------------</span>")
+	var/list/L = list()
 	L.Add("<b>Your role on the station is: [alt_title ? alt_title : rank].")
 	L.Add("You answer directly to [job.supervisors]. Special circumstances may change this.")
 	L.Add("For more information on how the station works, see [wiki_link("Standard_Operating_Procedure", "Standard Operating Procedure (SOP)")].")
@@ -456,9 +456,8 @@ SUBSYSTEM_DEF(jobs)
 	L.Add("<br>If you need help, check the [wiki_link("Main_Page", "wiki")] or use Mentorhelp(F1)!</b>")
 	if(job.important_information)
 		L.Add("</b><span class='userdanger' style='width: 80%'>[job.important_information]</span>")
-	L.Add("<span class='green'>----------------</span></center><br><br>")
 
-	to_chat(H, L.Join("<br>"))
+	to_chat(H, chat_box_green(L.Join("<br>")))
 
 	return H