Documentation needs refactoring

[Andesha]

Description

Need work to be done on documentation

[plstonge]

Just to let you know, I am working on it in two forks+branches:

• https://github.com/plstonge/ViewClust/tree/doc-update1/docs
• https://github.com/plstonge/ViewClust-Vis/tree/doc-update1/docs