* feat: [AA-1207] remove redundant Tabs fields from courseware API
All the tab information now goes through the course home metadata tab fields. This field is redundant.
* feat: [AA-1206] remove redundant fields from API
Part of a larger effort to clean up the MFE BFF endpoints.
Remove the redundant fields username and course_access, both of which are also available in the course home metadata call.
* feat: Course Apps API
This adds a new concept called course apps. These are exposed via a new
"openedx.course_app" entrypoint, which helps the LMS and studio discover such
apps and list them in a new rest api for the same.
These course apps will drive the pages and resources view in the course authoring
MFE. This system will track which apps are enabled and which are disabled. It
also allows third-party apps to be listed here by using the plugin entrypoint.
* Apply feedback from review
API docs generation was being blocked by missing values in the doc
settings. We wanted to update the swagger.yml to get the toggle state
("/toggles/v0/state/") endpoint in the docs.
