ROADMAP post v1.0

[seanmonstar]

This updates the ROADMAP, since much of what was previously in it was accomplished in the v1 work. For now, it archives the previous roadmap too. That does make the diff look weird, but really the previous file was just renamed, and the new one is in the original file. So, while it looks like all in ROADMAP-1.0.md is new, it's just a rename. The rendered version may be more useful to look at.

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Uplifting the summary:

Goal

Align current hyper to the [hyper VISION][VISION].

The VISION outlines a decision-making framework, use-cases, and general shape of hyper. This roadmap describes the focus areas to continue to improve hyper to look more like what is in the VISION.

Focus Areas

While open source is not a company, open source can be guiding. We can focus attention to specific areas of improvement, which are based on conversations with users, and prioritized by frequency and impact.

To that end, the following 4 areas are current focus of the project:

1. Documentation
2. hyper-util
3. HTTP/3
4. Observability

Each area benefits from having a top level description and goal, a place to track progress, and a champion (or two) that helps push the effort.