FreeDV 2_0_0_ RADE Doc

[drowe67]

Collect, draft, review and publish documentation on RADE. Like the software, this should not be ad-hoc, but carefully thought out and reviewed, a team effort.

• [x] Collect info from disparate sources, such as (a) FreeDV 2.0.0-20241018 release email (b) RADE primer (c) any new instructions/notes that have been generated since 2.0.0-20241018
• [ ] Add content on our roadmap. We need to avoid making any promises on feature enhancements the PLT has not committed to.
• [x] Document PLT policy re Windows/Linux/OSX distributions. For example "currently only Windows packaging is being maintained by FreeDV team - Linux users are welcome to compile from source, but must perform their own support".
• [x] Decide where to publish, It would be good to make this a single location, e.g. README.md or freedv.org web page.
• [x] Draft
• [x] Review
• [x] Publish