Structure documentation for multiple projects

[edulix]

Parent issue: https://github.com/sequentech/documentation/issues/78

Implement issue #78: Use https://docusaurus.io/docs/sidebar/autogenerated and https://docusaurus.io/docs/sidebar/multiple-sidebars to structure docusaurus documentation for multiple projects, one per repository.

Features

• [x] Update dependencies
• [x] Rearrange files and folders to match desired sidebar structure
• [x] Use autogenerated sidebars from directory structure