Matt Fox

In line with recent developments to the Policy Simulation Library (PSL) website, this PR updates the `PSL_catalog.json` file format to add further customisation and improved compatibility with the latest PSL...

SE-3319: Workflow Sample Notebook

3

# Pull Request Checklist - [x] Changes follow the [style guide](https://github.com/finbourne/sample-notebooks/blob/master/docs/FINBOURNE%20notebook%20style%20guide.ipynb) - [ ] Tests pass - [x] Raised the PR against the `develop` branch - [x] Notebook outputs do...