Docfx v3 migration

[VSC-Service-Account]

Migration PR to turn docfx build engine to v3

[opbld31]

Docs Build status updates of commit f03c6ec:

:warning: Validation status: warnings

File	Status	Preview URL	Details
ValidatePublishRequest	:warning:Warning		Details
.openpublishing.publish.config.json	:white_check_mark:Succeeded

ValidatePublishRequest

• [Warning] Owner brene of repository https://github.com/Microsoft/skype-interviews-docs has lost Admin permission. Please use Transfer Owner via Docs portal https://ops.microsoft.com to assign a new owner.

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.