Add a CB 2.0 State of the Works doc. [1/1]

This doc will be updated to keep track of the core Crowbar concepts and how they interact.

 doc/devguide/cb2-sotw.md | 381 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 381 insertions(+)

Crowbar-Pull-ID: 01d66ebc126fceb6d78975ab38134c0720364bc9

Crowbar-Release: development