Add a curriculum guide + github class room instructions

[wisammechano]

When we added FIS curriculum, it set the expectation of how to handle the curriculum in general. Thus students ran into issues when we shifted to this curriculum. Like the nature of the assignments, and the importance of reading the materials first before the class.

I think we can add a guide that outlines how this curriculum is structured, as well as the difference between the assignments types (code-along vs assignments) . We can also shed a light on the importance of external links that are present through out the reading materials + the resources section.

The guide would help answer most of the students questions in regard to how we linked the reading materials to the assignments.