• We have BFS and DFS images in both Breadth First Traversal and Depth First Traversal. We should have illustrations in the respective sections.

The API is well-defined in the code, but it would be nice to have it in ReadTheDocs.
It would also allow us to add bits of useful information, such as the fact that #470 exists.

This will allow students to navigate the repo structure easily, without having to come back to the main repo each time.