Update README.md to be clearer

[alilleybrinker]

View the rendered README.md here

---

This amends the README.md file to be clearer to navigate. This is achieved in several ways:

• All links are now hyperlinks on explanatory text, instead of bare URLs.
• Where appropriate, information has been gathered into tables.
• How to participate in the QWG and contribute in the repository has been spelled out explicitly.
• The distinction between the "production" and "development" versions of the format have been clearer by being split into distinct sections.

[Rucellmai61]

#rucellmai61

This review is not justified unless more details can be provided

[ElectricNroff]

My experience is that this approach to using tables for navigation would fail an accessibility review. The new design is an improvement for many users but doesn't interact well with some common assistive technology.

For example, when a screen reader is being used, and the user navigates through this:

| Format         | Link          |
|:---------------|:--------------|
| Separate files | [View][fmt_1] |
| Single file    | [View][fmt_2] |
| Interactive    | [View][fmt_3] |
| Mindmap        | [View][fmt_4] |

with the tab key (which, of course, only goes to focusable links and thus always remains in the second column), the spoken word "View" is used to announce each of the four links. It's harder to pick the desired one from four identical announcements. There are other options but, in general, the user would either have to remember a row number, or remember what was announced when they were in a different cell.

Also (less important), the user would hear "table with 4 rows and 2 columns" and this is a bit complex for a situation where a list can be used. GitHub .md files can't be used to satisfy all aspects of accessibility, but I feel that it would be better to replace all tables with approaches similar to:

#### Choose a view

- [View separate files][fmt_1]
- [View single file][fmt_2]
- [View interactive demo][fmt_3]
- [View mindmap][fmt_4]

[fmt_1]: https://github.com/CVEProject/cve-schema/blob/main/schema/CVE_Record_Format.json
[fmt_2]: https://github.com/CVEProject/cve-schema/blob/main/schema/docs/CVE_Record_Format_bundled.json
[fmt_3]: https://cveproject.github.io/cve-schema/schema/docs/
[fmt_4]: https://cveproject.github.io/cve-schema/schema/docs/mindmap.html

[alilleybrinker]

Thanks, that's great feedback! I hadn't considered the impact of the table-based approach on screen reader accessibility and that's absolutely an oversight on my part. I really appreciate it, and will update the PR to replace the tables.

[alilleybrinker]

@ElectricNroff, I've made the changes you suggested to remove the tables. Thanks again!

[alilleybrinker]

Note to self, I need to add Dave Waltermire to the list of chairs in the README.

EDIT: Done, added Dave.