[ADD] real_estate,* : complete real estate module and inherit the estate account

[prbo-odoo]

*= estate_account

This pull request includes set up of real_eastate module. Included relational fields for offers, property types, tags and properties. Such as accepting/rejecting offers, constraint checking and support for various property states ( new, sold, canceled) was added to simulate in the module. Applied access controls so that only specific users can view or change certain data. Also created custom views like List, Form and Search so users can easily interact with the system. Invoices are automatically created when a property is sold, by connecting this module with the estate_account module.

[robodoo]