Create Wiki for 'AWS Glue Script Explanation' on GitHub

[rosita-dmello]

• Explain the script created for migration on AWS Glue
• Link the explanation to the documentation for migration of data

[rosita-dmello]

This task was to explain the AWS Glue script used in the migration of tables from BigQuery to AWS S3. The documentation for the migration can be found on this Wiki Page. The script used in the migration process is explained here.