[IMP] energy_selfconsumption: add button to open invoicing mode configuration wizard

energy_selfconsumption/models/selfconsumption.py

energy_selfconsumption/security/ir.model.access.csv

energy_selfconsumption/views/selfconsumption_views.xml

energy_selfconsumption/wizards/__init__.py

...y_selfconsumption/wizards/define_invoicing_mode_wizard.py