Have file structure mirror the documentation page structure

[lucyleeow]

🧰 Task

docs/guides contains items that fall under the "In-depth explanations" section of the docs. I find this confusing because we also have a "How-to guides" section of the docs.

Could we rename docs/guides/ to docs/explanations/ or something similar?

[DragaDoncila]

@lucyleeow yeah i think it would be good for the directory structure to more closely mimic where things end up in the website. I don't know of any good reason not to do this.

[lucyleeow]

I've amended this issue to be more general, so it is easier to navigate the docs files.

AFAICT this would involve:

• renaming docs/guides/ to docs/explanations/
• moving docs/tutorials/fundamentals/ ('Usage' -> 'Getting started') to docs/getting_started/

The docs/further-resources/ file doesn't exactly mirror the docs but I think this is fine to leave.