Created an API to be called by the Outline Tab
in the Course Home MFE. This API currently only
returns Course Tool data. Preemptively using the
`course_home_api/outline/v1/...` naming scheme to
make way for more Outline Tab data within this API.

This endpoint is intended to contain generic information for
every page in the Course Home MFE. It contains course information
for the header (Course title, org, number, key) as well as staff
status for the user and the Course tabs to display.

This adds in the API for the Dates Tab for use by the
Course Home MFE.