Add a wrapper for using the tool without installation via setuptools

bin/kconfig-hardened-check

+#!/usr/bin/python3
+
+# For using the tool without installation via setuptools
+
+import os
+import sys
+import inspect
+
+current_dir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+parent_dir = os.path.dirname(current_dir)
+sys.path.insert(0, parent_dir)
+
+import kconfig_hardened_check
+
+if __name__ == "__main__":
+    kconfig_hardened_check.main()