Show syllabus as a sequence of steps

[nileshtrivedi]

Currently, syllabus look like articles: https://learnawesome.org/items/1c96e03a-ffff-4579-b69a-0387b968b7c6-syllabus-scratch-programming-for-kids

We should present them as a sequence of steps where progress can be marked as completed/ongoing/pending etc. This should not require any database changes because syllabus is a sequence of items where the user can already mark a status.