Reorganize verif and create packages

Split generator and runner scripts
Add package setup
Add py-dev-env.sh/.bash to allow editing source files during dev
Update README.md with installation info

Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: I172fe426d99e2e9aeeacedc8b8f3b6a79c8bd39d
diff --git a/scripts/xunit/__init__.py b/scripts/xunit/__init__.py
new file mode 100644
index 0000000..39e9ecc
--- /dev/null
+++ b/scripts/xunit/__init__.py
@@ -0,0 +1,3 @@
+"""Namespace."""
+# Copyright (c) 2021-2022 Arm Limited.
+# SPDX-License-Identifier: Apache-2.0