Add import error handling and clean CLI menu

Resources/ioreg.py

@@ -4,8 +4,17 @@
 from __future__ import annotations
 
 from typing import NewType, Union
+import subprocess
+
+try:
+	import objc
+except ImportError:
+	subprocess.run(["pip3", "install", "pyobjc"], stdout=subprocess.PIPE)
+	try:
+		import objc
+	except ImportError:
+		raise Exception("Missing PyObjc library!\nPlease run the following before starting OCLP:\npip3 install pyobjc")
 
-import objc
 from CoreFoundation import CFRelease, kCFAllocatorDefault  # type: ignore # pylint: disable=no-name-in-module
 from Foundation import NSBundle  # type: ignore # pylint: disable=no-name-in-module
 from PyObjCTools import Conversion