Suggested Readme improvements

[G-Fynn24]

As part of a Documentation quality analysis project led by ARC, we've found this repository could be improved in the following areas by:

• Adding a short example on how to use this project
• Providing information on how the users could ask for help
• Consider including whether using GenAI is acceptable for contributions
• Consider adding a changelog to inform your users what's changed between versions
• Adopting a Code of Conduct

If you need help with anything of the the above, join one of ARC Drop-in sessions and one of our team members will help you.

[samcunliffe]

• Adding a short example on how to use this project

There is a section How to run and a top-level directory called "examples"

• Providing information on how the users could ask for help

First few lines of CONTRIBUTING.md ...?

• Consider adding a changelog to inform your users what's changed between versions

The version release notes are our changelog.