Show new blips as stars and add table of ring descriptions

[SoumayaMauthoorMOJ]

Hello @bocytko I really like this visualisation and would like to propose a few backwards-compatible changes:

• Move various config variables to radar.js and set default values to simplify index.html but allow users to overwrite values
• Link radar title to repository homepage if provided, otherwise stay on the same page
• Show blip as star if moved = null indicating that it is new
• Update footer text and place beneath radar diagram
• Include optional table of ring assignments and descriptions

Here is what my radar looks like with these changes: https://moj-analytical-services.github.io/data-and-analytics-engineering-tech-radar/

[SoumayaMauthoorMOJ]

Hello any thoughts about these changes? Here's the link to your tech radar showing how the changes are backwards compatible: https://soumayamauthoormoj.github.io/tech-radar/

[bocytko]

@SoumayaMauthoorMOJ thanks for the PR and for providing the two examples, which made the review much easier. I like the changes with adding the star for the new entry.

I added suggestions directly in the code. These should be pretty straightforward. If there are further questions, just ask.

[SoumayaMauthoorMOJ]

Hey @bocytko thanks for the feedback I've now made all the requested changes as a single commit. I wasn't sure if you wanted the shape logic to be moved = 0 - no-change (〇) or else - no-change (〇) so I've left it as-is

[bocytko]

Thank you for the adjustments and for the contribution!

I will apply a few cosmetic fixes in a follow-up PR.