core: introduce global context (MR 2252)

We can't totally escape the need for some runtime state defined by args.
To make the migration easier, introduce a global "Context" class and
move some of the read-only global options there.

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

pmb/core/context.py

@@ -0,0 +1,15 @@
+# Copyright 2024 Caleb Connolly
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+"""Global runtime context"""
+
+class Context():
+    details_to_stdout: bool
+    quiet: bool
+    command_timeout: float
+    sudo_timer: bool
+
+    def __init__(self):
+        self.details_to_stdout = False
+        self.command_timeout = 0
+        self.sudo_timer = False