[📚 Documentation Issue]: implement new documentation structure

[egarciamendez]

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• I have read the relevant section of the documentation.
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Documentation Section

.
├── Home
├── Getting Started/
│ ├── Installation
│ ├── Quick start
│ ├── Changelog/
│ │ └── How to upgrade
│ └── ...
├── Guides/
│ ├── Concepts/
│ │ ├── Structure (document about the fact we are organizing by document)
│ │ ├── Formulas (Explanation of what the formula object is and how it is designed)
│ │ └── Code Standards (objects overview)
│ ├── Examples/
│ │ └── ...
│ └── Contributing
└── API Reference

Inspired by https://squidfunk.github.io/mkdocs-material/

Issue Description

Let's make the docs a place worth visiting!

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