doc - Create and maintain documentation targeted to ONAP user audiences

Age	Commit message (Expand)	Author	Files	Lines
2022-08-04	update and rearrange documentation related content	thmsdt	12	-550/+0
2021-05-06	Template updates - sections	Andrea Visnyei	12	-106/+282
2020-11-30	Remove all warnings during Documentation buildings	Eric Debeau	12	-0/+374