Add typing information, 2/n (#1178)

* Add typing to Docker Stack modules. Clean modules up.

* Add typing to Docker Swarm modules.

* Add typing to unit tests.

* Add more typing.

* Add ignore.txt entries.

tests/unit/plugins/module_utils/test__scramble.py

@@ -20,7 +20,7 @@ from ansible_collections.community.docker.plugins.module_utils._scramble import
         ("hello", b"\x01", "=S=aWRtbW4="),
     ],
 )
-def test_scramble_unscramble(plaintext, key, scrambled):
+def test_scramble_unscramble(plaintext: str, key: bytes, scrambled: str) -> None:
     scrambled_ = scramble(plaintext, key)
     print(f"{scrambled_!r} == {scrambled!r}")
     assert scrambled_ == scrambled