add new "index.ipynb" for use with RWTH Jupyter

.gitignore

 .vscode/settings.json
 pythonintro/__pycache__/fibonacci.cpython-310.pyc
+pythonintro/.ipynb_checkpoints/Classes_Inheritance-checkpoint.ipynb
+pythonintro/.ipynb_checkpoints/PandasIntro-checkpoint.ipynb

pythonintro/index.ipynb

+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Welcome\n",
+    "\n",
+    "Welcome to the course \"Introduction to Python and Data Science for Materials Science\"\n",
+    "\n",
+    "This repository focuses on getting familiar with Python and you can find all notebooks relevant to the course here."
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "pythonintro-NlsZwE_T-py3.10",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "name": "python",
+   "version": "3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]"
+  },
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "e79a103ddccd343bb7d1be701b671c098efc420295b660c764763b93be962cdf"
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}