Add a Helm overview page to the docs

[paigecalvert]

This issues tracks work to add a new page to the introductory section of the docs that describes the Helm project, its goals, core concepts, user personas, and key use cases, clearly addressing the who/what/when/why for Helm.

This aligns with the criteria identified by the CNCF techdocs team for graduated projects for "high level conceptual content": https://github.com/cncf/techdocs/blob/main/docs/analysis/criteria.md#assessment-criteria-and-examples

Adding an overview page was originally proposed in https://github.com/helm/community/blob/main/hips/hip-0024.md

[spmse]

Is there more information regarding the initial request?
Introduction to the helm would already be there in https://helm.sh/docs/intro/using_helm#three-big-concepts but I think this the wrong place or "too hidden"?

Shouldn't the overview/introduction be placed in the category with the same name, e.g. Introduction, maybe even directly in the category index?

From a developers and users perspective it would also make sense to me to place an introduction document under Introduction > Overview before the next section is the Quickstart.

[paigecalvert]

@spmse thanks for your thoughts on this one. For the latest on this and other efforts to make some big improvements to the Helm docs, you can see the helm.sh site analysis that I completed and sent over the CNCF techdocs team for their review: cncf/techdocs#332. The next steps are to get their review/incorporate any feedback, and then create a set of issues to accomplish the work. If that's something you'd be interested in helping out with, I'd love to keep you in the loop :)

You've also reminded me that I'll need to go through some of these stale issues and clean them up.