Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/distutils/config.pyi

@@ -0,0 +1,17 @@
+from abc import abstractmethod
+from distutils.cmd import Command
+from typing import ClassVar, List, Optional, Tuple
+
+DEFAULT_PYPIRC: str
+
+class PyPIRCCommand(Command):
+    DEFAULT_REPOSITORY: ClassVar[str]
+    DEFAULT_REALM: ClassVar[str]
+    repository: None
+    realm: None
+    user_options: ClassVar[List[Tuple[str, Optional[str], str]]]
+    boolean_options: ClassVar[List[str]]
+    def initialize_options(self) -> None: ...
+    def finalize_options(self) -> None: ...
+    @abstractmethod
+    def run(self) -> None: ...