Distro, Cmd, AsyncSSH: Fix bare generic types

Add explicit type arguments to all generic type annotations that were
previously bare, satisfying the new disallow_any_generics mypy rule.

Fixes:
- Distro.py: Iterable[str] for expand_macros fmt parameter
- Cmd.py: Types[Any] for add_subcommands cmds parameter
- AsyncSSH.py: dict[str, Any] for _connect_kwargs return type

Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev 0.81.1
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/lib/ec/ssh/AsyncSSH.py

@@ -1,4 +1,4 @@
-from typing import override
+from typing import Any, override
 import asyncio
 import os
 import shlex
@@ -58,8 +58,8 @@ class AsyncSSH(Base):
                 log(DEBUG, f'Failed to close connection ({str(e)}, ignored)')
             self.__conn = None
 
-    def _connect_kwargs(self, hide_secrets: bool = False) -> dict:
-        kwargs: dict = {
+    def _connect_kwargs(self, hide_secrets: bool = False) -> dict[str, Any]:
+        kwargs: dict[str, Any] = {
             'host': self.hostname,
             'port': self.port,
             'username': self.username,