[IMP] energy_project: Adding reseller and supplier model

Implementation branch of these MR:

• !204 (merged)
• !203 (merged)

Changelog

• [IMP] energy_project: new model reseller
• [IMP] energy_project: new model supplier
• [IMP] energy_project: on load reseller and supplier from import assignate xml_id parsing from order field.
• [IMP] energy_project: added data for reseller on load (last update 13/09/2023 source)
• [IMP] energy_project: added data for supplier on load (last update 14/09/2023 source)
• [IMP] energy_project: access from res.config.setting to reseller and supplier
• [IMP] energy_project: unit testing for xml_id
• [IMP] energy_selfconsumption: added field reseller_id and supplier_id

Roadmap will do in implementation branch

• I18N (cat, es, eu and eng)

energy_selfconsumption/models/supply_point.py

@@ -31,6 +31,7 @@ class SupplyPoint(models.Model):
     company_id = fields.Many2one(
         "res.company", default=lambda self: self.env.company, readonly=True
     )
+    reseller_id = fields.Many2one("energy_project.reseller", string="Reseller")
 
     # Address fields
     street = fields.Char(required=True)