[ADD] estate_account: added model

after this commit:
implemented override method
implemented create method

estate_account/__init__.py

@@ -0,0 +1 @@
+from . import models

estate_account/__manifest__.py

@@ -0,0 +1,10 @@
+{
+    'name': 'Estate Account',
+    'version': '1.0',
+    'category': 'Real Estate',
+    'depends': ['estate', 'account'],
+    'data': [],
+    'license': 'LGPL-3',
+    'installable': True,
+    'application': True
+}

estate_account/models/__init__.py

@@ -0,0 +1 @@
+from . import estate_property

estate_account/models/estate_property.py

@@ -0,0 +1,26 @@
+from odoo import models, fields, Command
+
+
+class EstateProperty(models.Model):
+
+    _inherit = "estate.property"
+
+    def action_sold(self):
+        super().action_sold()
+        move_values = {
+            "partner_id": self.buyer.id,
+            "move_type": "out_invoice",
+            "invoice_line_ids": [
+                Command.create({
+                    "name": "6% of selling price",
+                    "quantity": 1,
+                    "price_unit": 0.6 * self.selling_price
+                }),
+                Command.create({
+                    "name": "administrative fees",
+                    "quantity": 1,
+                    "price_unit": 100.0
+                })
+            ],
+        }
+        self.env['account.move'].create(move_values)