Adds OOC verb to show the last round end report you've viewed (#37900)

You can now view your last round end report window with the "Your last round" verb in the OOC tab

stores the HTML in a data dir

code/modules/client/client_procs.dm

@@ -223,6 +223,9 @@ GLOBAL_LIST_EMPTY(external_rsc_urls)
 	prefs.last_id = computer_id			//these are gonna be used for banning
 	fps = prefs.clientfps
 
+	if(fexists(roundend_report_file()))
+		verbs += /client/proc/show_previous_roundend_report
+
 	log_access("Login: [key_name(src)] from [address ? address : "localhost"]-[computer_id] || BYOND v[byond_version]")
 	var/alert_mob_dupe_login = FALSE
 	if(CONFIG_GET(flag/log_access))