Add Z-Level Manager, a basic admin tool. (#30397)

* Add Z-Level Manager, a basic admin tool.

* build bundle, use ui_module/admin

* fix type restriction

* remove unnecessary params

code/modules/admin/admin_verbs.dm

@@ -72,7 +72,8 @@ GLOBAL_LIST_INIT(admin_verbs_admin, list(
 	/client/proc/ping_all_admins,
 	/client/proc/show_watchlist,
 	/client/proc/debugstatpanel,
-	/client/proc/create_rnd_restore_disk
+	/client/proc/create_rnd_restore_disk,
+	/client/proc/open_admin_zlevel_manager,
 ))
 GLOBAL_LIST_INIT(admin_verbs_ban, list(
 	/client/proc/ban_panel,

code/modules/admin/verbs/admin_zlevel_manager_verb.dm

@@ -0,0 +1,15 @@
+/client/proc/open_admin_zlevel_manager()
+	set name = "Z-Level Manager"
+	set desc = "Opens the Z-Level Manager UI"
+	set category = "Admin"
+
+	if(!check_rights(R_ADMIN))
+		return
+
+	if(!SSmapping || !SSmapping.initialized)
+		to_chat(usr, "<span class='notice'>SSmapping has not initialized yet, Z-Level Manager is not available yet.</span>")
+		return
+
+	message_admins("[key_name_admin(usr)] is using the Z-Level Manager")
+	var/datum/ui_module/admin/z_level_manager/ZLM = get_admin_ui_module(/datum/ui_module/admin/z_level_manager)
+	ZLM.ui_interact(usr)