Base: Modernize Python bindings APIs

src/Base/BaseClass.pyi

@@ -0,0 +1,31 @@
+from Metadata import constmethod
+from PyObjectBase import PyObjectBase
+from typing import List, Final
+
+class BaseClass(PyObjectBase):
+    """
+    This is the base class
+
+    Author: Juergen Riegel (FreeCAD@juergen-riegel.net)
+    Licence: LGPL
+    """
+
+    TypeId: Final[str] = ""
+    """Is the type of the FreeCAD object with module domain"""
+
+    Module: Final[str] = ""
+    """Module in which this class is defined"""
+
+    @constmethod
+    def isDerivedFrom(self, typeName: str) -> bool:
+        """
+        Returns true if given type is a father
+        """
+        ...
+
+    @constmethod
+    def getAllDerivedFrom(self) -> List[object]:
+        """
+        Returns all descendants
+        """
+        ...