[ADD] Chapter 1,2 : add initial estate application

Created the necessary __init__.py and __manifest__.py files
to initialize the estate application.

Author: snrav-odoo

estate/__init__.py

@@ -0,0 +1,11 @@
+{
+    'name': 'Real Estate',
+    'version': '1.0',
+    'category': 'Real Estate',
+    'depends': ['base'],
+    'author': 'snrav-odoo',
+    'license': 'LGPL-3',
+    'description': 'Real estate purchase & sales',
+    'application': True,
+}
+