If PR already has an assignee, do not add additional assignees to the
PR. Each PR should only have one assignee (in most cases)
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Use MAINTAINERS.yml file to set lables, assignees and reviewers for
specific PRs or all unassigned PRs since a given date.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>