odoo/tutorials#778

Created by Karim Omrane (kaom)

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odoo-dev:18.0-tutorial-kaom
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3d26bd8e299b1103383fe36f2ae563aeb89591bc
odoo/tutorials
18.0 #778 missing r+
master

[ADD] Estate: Adding the new Real Estate Module's directory.

In this PR, I initialized the basic structure of the new Estate module directory (manifest and init files).
This work is related to the second chapter of the server framework 101 official documentation by Odoo.