[WIP] Added first changes for the DI

src/cpl/dependency_injection/service_descriptor.py

@@ -0,0 +1,33 @@
+from typing import Union, Optional
+
+from cpl.dependency_injection.service_lifetime_enum import ServiceLifetimeEnum
+
+
+class ServiceDescriptor:
+
+    def __init__(self, implementation: Union[type, Optional[object]], lifetime: ServiceLifetimeEnum):
+
+        self._service_type = implementation
+        self._implementation = implementation
+        self._lifetime = lifetime
+
+        if not isinstance(implementation, type):
+            self._service_type = type(implementation)
+        else:
+            self._implementation = None
+
+    @property
+    def service_type(self) -> type:
+        return self._service_type
+
+    @property
+    def implementation(self) -> Union[type, Optional[object]]:
+        return self._implementation
+
+    @implementation.setter
+    def implementation(self, implementation: Union[type, Optional[object]]):
+        self._implementation = implementation
+
+    @property
+    def lifetime(self) -> ServiceLifetimeEnum:
+        return self._lifetime