Add automatic role assignment on member join for rules acknowledgment

- Introduced a new function `assign_rules_arrival_on_join` to assign the arrival role to members upon joining, based on configuration settings.
- Updated the `on_member_join` event to call the new function, enhancing the user experience by providing immediate role assignment.
- Modified configuration options in the web application to allow enabling or disabling this feature.
- Updated the configurations template to reflect the new role assignment behavior, ensuring clarity for users.

webapp/configurations.py

@@ -50,6 +50,7 @@ def updateConfiguration():
 		'auto_rooms_enable': 'auto_rooms_channel_id',
 		'twitch_commands_enable': 'twitch_channel',
 		'rules_ack_enable': 'rules_channel_id',
+		'rules_arrival_on_join_enable': 'rules_ack_section_in_form',
 	}
 	
 	# Ne mettre à jour les rôles staff que si la liste a été rendue dans le formulaire.