Milestones

Changes to Create milestone

post/sites/{site_id}/milestones

Aug 10, 202650679caad756 Revision changes
- breaking
  added the new path request parameter site_id
- breaking
  removed the success response with the status
- info
  api operation id createMilestone was added
- info
  api tag Milestones added
- info
  added the non-success response with the status
- info
  added the non-success response with the status
- info
  added the success response with the status