commands: new submodule (MR 2252)

The current mechanism of invoking pmbootstrap actions can be a bit
confusing, and relies heavily on args being a big namespace with lots of
properties (which may or may not be valid depending on the context).

To aid in slowly removing args from the codebase, introduce a new
mechanism for running commands. This works by having a class for each
command, where the arguments are passed in as parameters to the
constructor.

No doubt this won't scale very far, but it's a skeleton we can continue
to build on as we migrate more commands over to not require args in
order to run.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>

pmb/commands/base.py

@@ -0,0 +1,9 @@
+# Copyright 2024 Caleb Connolly
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+class Command():
+    """Base class for pmbootstrap commands."""
+
+    def run(self):
+        """Run the command."""
+        raise NotImplementedError()