Code cleanup, use pathlib, use pytest keyboard

Clean up checks and logics that are unnecessary due to MILC updates.
Use pathlib instead of os.path for readability.
Use the 'pytest' keyboard for the tests.
Add community layout for 'handwired/onekey/pytest' so we can test
community layouts.

lib/python/qmk/cli/list/keymaps.py

@@ -10,17 +10,13 @@ from qmk.errors import NoSuchKeyboardError
 def list_keymaps(cli):
     """List the keymaps for a specific keyboard
     """
-    # ask for user input if keyboard was not provided in the command line
-    if cli.args.keyboard:
-        cli.config.list_keymaps.keyboard = cli.args.keyboard
-    elif not cli.config.list_keymaps.keyboard:
-        cli.config.list_keymaps.keyboard = input("Keyboard Name: ")
-
     try:
         for name in qmk.keymap.list_keymaps(cli.config.list_keymaps.keyboard):
             # We echo instead of cli.log.info to allow easier piping of this output
-            cli.echo('%s:%s', cli.config.list_keymaps.keyboard, name)
+            cli.echo('%s', name)
     except NoSuchKeyboardError as e:
         cli.echo("{fg_red}%s: %s", cli.config.list_keymaps.keyboard, e.message)
     except (FileNotFoundError, PermissionError) as e:
         cli.echo("{fg_red}%s: %s", cli.config.list_keymaps.keyboard, e)
+    except TypeError:
+        cli.echo("{fg_red}Something went wrong. Did you specify a keyboard?")