Make the documentation more lightweight and readable

[rluthi]

DataPrep is a great tool! And the automatic EDA module is probably the best open-source option out there.

However, I find your package difficult to understand and learn from your documentation. It makes it feels more complicated than it actually is.

Some ideas to improve :

• Highlight 2 line EDA report creation (only advanced users need the detail)
• Separate documentation from case studies
• Organise the sub-sections in doc of the Clean module