287 restructure docs

[gisellerosetta]

Proposed Changes

• Restructure documentation to have a clearer structure, combining API details.
• Took a minimal approach so it can be built on with Scoping documentation improvements #290

Related Issues

• Fixes Restructure documentation #287
• Related to Scoping documentation improvements #290

Pre-requisites

This section may not be fully required if the branch is not merging into main.
Please indicate items that aren't necessary and why, with comments around incomplete checks.

• Version number has been incremented, according to SemVer NA
• Changelog has been updated, listing changes to this version. Use the keep a changelog format
• New features are tested NA
• New features are documented using the numpydoc docstring format NA
• Other relevant package documentation is updated
• For new functionality, examples are included in the docs or a feature request has
  been made for it/them. NA

[CHCRowley]

This is looking great! I'm finding it much more logical to navigate. Small thing but you could add additional subheadings to the 'Getting Started' page for the Notes and Cover page examples. Also I remember seeing an example for adding multiple sheets I'm not sure if this needs to be included somewhere? Otherwise happy to approve 😄

[CHCRowley]

This works really well 😄