Add the ORM.

tui_rsync/core/ports/orm/__init__.py

@@ -0,0 +1,3 @@
+from .database_manager_port import DatabaseManagerPort
+
+__all__ = ['DatabaseManagerPort']

tui_rsync/core/ports/orm/database_manager_port.py

@@ -0,0 +1,11 @@
+from abc import ABC, abstractmethod
+
+
+class DatabaseManagerPort(ABC):
+    @abstractmethod
+    def get_connection(self):
+        pass
+
+    @abstractmethod
+    def create_tables(self):
+        pass