Add scripts to setup a virtual python environment

Use:
```
cd script
source setup_venv.sh
```
to change to the venv.

README.md

@@ -9,6 +9,23 @@ be included into all relevant Yocto repositories as a [git submodule][1].
 [1]: https://git-scm.com/book/en/v2/Git-Tools-Submodules
 
 
+<!----------------------------------------------------------------------------->
+## Python development
+<!----------------------------------------------------------------------------->
+
+The `scripts` subfolder contains the implementation of the task executed from
+the CI. In the CI environment docker containers from the ci-images repository
+are used. They contain the correct python version and needed packages.
+For local execution of the scripts a virtual python environment may be setup
+using the following command:
+
+```
+cd scripts
+source setup_venv.sh
+```
+*Note:* Currently the requirements.txt and the Dockerfile for the containers
+need to be synced manually.
+
 <!----------------------------------------------------------------------------->
 ## The GitBot user
 <!----------------------------------------------------------------------------->

scripts/requirements.txt

+black==23.1.0
+furl==2.1.3
+gitpython==3.1.30
+jinja2==3.1.2
+junitparser==2.8.0
+lxml==4.9.2
+markdown2==2.4.7
+pylint==2.16.1
+python-gitlab==3.13.0
+ruamel.yaml==0.17.21
+Flask==2.3.2
+

scripts/setup_venv.sh

+#!/bin/sh -x
+
+python3.10 -m venv venv
+. ./venv/bin/activate
+pip install -r requirements.txt