chore(types): add pyright strict config and fix resulting errors

Adds pyrightconfig.json (strict, Python 3.11) covering cli.py,
claude_bottle/, and tests/. Fixes the 49 strict-mode errors:

- Type DockerBottle.teardown as Callable[[], None].
- ResolvedEnv default_factory uses parameterized list[str] / dict[str, str].
- Erase BottleBackend generics at the registry boundary
  (BottleBackend[Any, Any]) since selection is runtime-driven and
  callers use the unparameterized interface.
- DockerBottleBackend.launch returns Generator[DockerBottle, None, None];
  @contextmanager now flags Iterator returns as deprecated.
- Sidestep cli.list submodule shadowing builtins.list in main()'s argv
  annotation via an aliased re-import in cli/__init__.py.
- Cast cfg[...] results in test_pipelock_yaml at the dict[str, object]
  boundary.
- Annotate write_fixture's fn parameter and _manifest_with_runtime's
  return type.

tests/unit/test_manifest_runtime.py

@@ -5,12 +5,13 @@ the legacy 'runtime' field must fail, regardless of value, rather than
 silently ignoring."""
 
 import unittest
+from typing import Any
 
 from claude_bottle.log import Die
 from claude_bottle.manifest import Bottle, Manifest
 
 
-def _manifest_with_runtime(value: object) -> dict:
+def _manifest_with_runtime(value: object) -> dict[str, Any]:
     return {
         "bottles": {"dev": {"runtime": value}},
         "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},