Complete the MFE conversion process for edx-platform

[kdmccormick]

Background

Part of:

• https://github.com/openedx/wg-frontend/issues/156

Tasks

See also: MFE Rewrite Tracker

- [ ] https://github.com/openedx/platform-roadmap/issues/322
- [ ] https://github.com/openedx/edx-platform/issues/31624
- [ ] https://github.com/openedx/edx-platform/issues/32692
- [ ] https://github.com/openedx/edx-platform/issues/31623
- [ ] https://github.com/openedx/public-engineering/issues/81
- [ ] https://github.com/openedx/public-engineering/issues/71
- [ ] https://github.com/openedx/edx-platform/issues/35261
- [ ] Clean up legacy pages that have already been converted to MFEs (https://openedx.atlassian.net/wiki/spaces/COMM/pages/4262363137/Existing+MFEs+with+corresponding+Legacy+Code)
- [ ] Convert program dashboard to MFE
- [ ] Convert course certificates to MFE
- [ ] Convert custom course tabs to MFE
- [ ] Convert instructor dashboard to MFE
- [ ] Deprecate or convert LMS "About Course" page to MFE
- [ ] Deprecate or convert LMS "Explore New" page to MFE
- [ ] *Search for any remaining legacy LMS pages that need conversion*
- [ ] Remove remaining unused legacy frontends
- [ ] Clean up frontend tooling, config, CI, etc.
- [ ] https://github.com/openedx/frontend-app-learning/issues/1455