add hotkey tests

tests/test_hotkey.py

@@ -0,0 +1,14 @@
+"""Unit tests for the hotkey command in the OBS WebSocket CLI."""
+
+from typer.testing import CliRunner
+
+from obsws_cli.app import app
+
+runner = CliRunner(mix_stderr=False)
+
+
+def test_hotkey_list():
+    """Test the hotkey list command."""
+    result = runner.invoke(app, ['hotkey', 'list'])
+    assert result.exit_code == 0
+    assert 'Hotkeys' in result.stdout