Add Bandit workflow to check for potential security issues

[JacquesPotgieter]

Description

Create a new GitHub Actions workflow which runs Bandit security linter. [GitHub/PyCQA/Bandit] is a tool designed to find common security issues in Python code.

Testing

Tried to run Bandit on my fork, but it keeps failing as Code Scanning is not enabled. . It is not possible for me to enable CodeScanning, as my fork is a Private Repo, and I do not have access to a GitHub Teams subscription.

These changes will be properly tested on the main package, as "Code Scanning" is currently enabled for this package. If we need further changes, I will update afterwards.

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[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.