Demo release with 6 use cases from FGAN-O-013-R1

Dear Colleagues,

I am creating a pre-release tag for the graph notebook.
Pre-release tag = v0.1
Filename = build_a_thon_graph_v1.ipynb
Date = 1 Aug 2022
Number of Use cases = 6
Primary ref: https://www.itu.int/en/ITU-T/focusgroups/an/Documents/Use-case-AN.pdf
Execution: you need collab or local jupyter.
Author: Vishnu ([email protected])