CCX Coach - Main

Create following endpoints

• http://local.openedx.io:8000/api/ccx_coach/v2/courses/{courseId or ccxCourseId}/metadata
  GET
  Expected response:

{
  course_id: string
  ccx_course_id: string
  tabs: array
}

Attributes:
Tabs - Same type as instructor tabs
ccx coach tabs:
- Enrollment
- Schedule
- Student Grades
- Grading Policy
When the courseId passed doesn't have a ccx course yet tabs response should be an empty array and ccx_course_id is an empty string

• http://local.openedx.io:8000/api/ccx_coach/v2/courses/{ccxCourseId}/create_ccx
  POST
  Expected Payload:

{ 
  name: string
}

To create a new ccx course reuse logic from following endpoint
http://local.openedx.io:8000/courses/{ccxCourseId}/create_ccx
Notes: right now a csrfmiddlewaretoken is sent, can we just send the name from frontend? 
And right now it is resolved as 302 we should change it