Introduce courseNavigationBar on header slot

[diana-villalvazo-wgu]

Description

As part of the conversion of MFEs to frontend base, we figured it out that 3 different repos will need Course Navigation Bar (Learning, Discussions and Instructor), so instead of having repetitive code on 3 different repos we come up with the following approach:

• Moving Course Navigation Tab bar to frontend-base as a slot inside the header and adding the roles where this new slot will be active.
• We need to get courseId (now we are grabbing it from current location) and make a request using react-query to gather correct course metadata (contains tabs info).
• We added an slot for extra content in case MFE needs to add it (current use case: Learning MFE, courseware search).

Screenshot

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[diana-villalvazo-wgu]

tried to use navigate as much as possible so we can preserve app state and avoid unneeded full page load

[diana-villalvazo-wgu]

This slot was added because on current learning MFE this nav bar has some extra content related to courseware search

[brian-smith-tcril]

@arbrandes do you remember which FWG meeting we discussed this in? I think I need to look through our discussion to remember how the "render conditionally based on role" part is supposed to work (IIRC we talked about apps having roles associated?)

[diana-villalvazo-wgu]

@arbrandes do you remember which FWG meeting we discussed this in? I think I need to look through our discussion to remember how the "render conditionally based on role" part is supposed to work (IIRC we talked about apps having roles associated?)

we discussed it on this one https://openedx.atlassian.net/wiki/spaces/COMM/pages/5255593985/2025-10-09+Frontend+Working+Group+Meeting+Notes+Shai-Hulud+Program+Dashboard+etc

For now i didn't introduce anything related to roles and just abstract how is working now (retrieving the enabled tabs from the course-metadata endpoint)