This PR adds update_admin_password in the library and CLI for SMARTCAM
devices. It also updates the update_credentials function to correctly
handle the local_account for local device authentication. It updates all
of the required tests and code coverage as well.
Update SmartCam time handling to apply timezone-only changes with explicit warnings, while keeping common time and CLI tests focused on devices that support setting clock time and adding SmartCam-specific coverage for the special behavior.
Add type annotations (`-> None` return types and parameter types) to
test files in the `tests/cli/`, `tests/protocols/`, and
`tests/smartcam/` directories. This enables mypy to check test function
bodies, catching type errors that were previously hidden.
