"How to write a custom provisioner?" doc

[mathieu-benoit]

Based on this blog post, it would be great/better to have a dedicated doc entry: "How to write a custom provisioner?" by taking inspiration from this blog post: https://score.dev/blog/writing-a-custom-score-compose-provisioner-for-apache-kafka/.

1 doc for both score-compose and score-k8s because the concept are the same (as opposed to one doc for each). It will a new page entry at the https://docs.score.dev/docs/score-implementation/ level, like we have this other entry today.

Rough TOC:

• Intro: what is it?
• Guidelines/Concepts (common)
• Example of score-compose's provisioners
• Example score-k8s's provisioners
• How to write your own?
• Pointer to https://github.com/score-spec/community-provisioners

[ankur0904]

@mathieu-benoit
Can I work on this issue and make the PR?

[mathieu-benoit]

Thanks @ankur0904 for raising your hand on this one.

Before you start, I would like to make sure @astromechza can chime in providing high level guidance here.