* filter courses by short lang codes
* reduce padding in course details page
* update home / registration routes
* refactor: replace find your people page with new course page from onboarding
* in new course pages, show images
* in space analytics, if no available languages, pick user's l2
* chore: add cooldown on ping participants
* replace image loading icon with shimmer
* file reorganization
* added activity summary widget to show in chat view and activity launch view
* more updates to activity sessions start page
* function to ping course
* remove duplicate loading of participants
* nav bar visibility changes
* add generalized image from url widget
* update bottom of screen activity status message and add summaries to chat event list
* scroll to summary on click
* show invited activity sessions in course chats view
