[ADD] estate_account: extend estate to create an invoice when property is sold

Author: aurb9

estate_account/__init__.py

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+from . import models

estate_account/__manifest__.py

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+{
+    'name': 'Real Estate Account',
+    'depends': ['base', 'estate', 'account'],
+    'author': "Odoo",
+    'installable': True,
+    'license': 'AGPL-3'
+}

estate_account/models/__init__.py

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+from . import estate_property

estate_account/models/estate_property.py

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+from odoo import Command, models
+
+
+class EstateProperty(models.Model):
+    _inherit = 'estate.property'
+
+    def action_set_sold(self):
+        self.env['account.move'].create({
+            'move_type': 'out_invoice',
+            'partner_id': self.partner_id.id,
+            'line_ids': [
+                Command.create({'name': self.name, 'quantity': 1, 'price_unit': 0.06 * self.selling_price}),
+                Command.create({'name': "Administrative fees", 'quantity': 1, 'price_unit': 100}),
+            ]
+        })
+        return super().action_set_sold()