[ADD] estate: create an estate app

Created an estate application for Odoo
Added models with basic fields
Implemented security rules for models
Configured menus and basic views (Form and List)
Introduced application structure and architecture overview

Author: sbha-odoo

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Estate',
+    'version': '1.0',
+    'depends': ['base'],
+    'author': 'Shiv Bhadaniya',
+    'application': True,
+    'auto_install': True,
+    'license': 'LGPL-3',
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_views.xml',
+        'views/estate_menus.xml'
+    ]
+}

estate/models/__init__.py

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+from . import estate_property

estate/models/estate_property.py

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+from odoo import fields, models
+
+class EstateProperties(models.Model):
+    _name = "estate.property"
+    _description = "Estate Property Model"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(copy=False,default= fields.Date.add(fields.Date.today(), months=+3))
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float(readonly=True, copy=False)
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Integer()
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    garden_orientation = fields.Selection([
+        ('north', 'North'),
+        ('south', 'South'),
+        ('east', 'East'),
+        ('west', 'West'),   
+    ])
+    active = fields.Boolean(default=False)
+    state = fields.Selection([
+        ('new', 'New'),
+        ('offer_received', 'Offer Received'),
+        ('offer_accepted', 'Offer Accepted'),
+        ('sold', 'Sold'),
+    ], copy=False, default='new', required=True,)

estate/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_estate_property_user,access_estate_property_user,estate.model_estate_property,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <!-- Top menu item -->
+    <menuitem 
+        id="menu_estate_root" 
+        name="Estate" 
+    >
+        <!-- Advertisement Submenu -->
+        <menuitem id="menu_advertisement" 
+            name="Advertisement"
+        >
+            <menuitem 
+                id="menu_advertisement_property" 
+                name="Properties" 
+                action="action_estate_property" 
+            />
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id='action_estate_property' model='ir.actions.act_window'>
+        <field name="name">Estate</field>
+        <field name="res_model">estate.property</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>