Add type stubs for socket and ssl modules; update MicromailClient to remove type ignores

.typestubs/ssl.pyi

@@ -0,0 +1,18 @@
+import socket
+
+from _typeshed import StrOrBytesPath
+
+def wrap_socket(
+    sock: socket.socket,
+    keyfile: StrOrBytesPath | None = None,
+    certfile: StrOrBytesPath | None = None,
+    server_side: bool = False,
+    cert_reqs: int = ...,
+    ssl_version: int = ...,
+    ca_certs: str | None = None,
+    do_handshake_on_connect: bool = True,
+    suppress_ragged_eofs: bool = True,
+    ciphers: str | None = None,
+) -> SSLSocket: ...
+
+class SSLSocket(socket.socket): ...