I really like the pygfx Guide section in their docs and think that we could do something similar:

• Installation
• What is fastplotlib
• How to use fastplotlib
• Figure
• Graphics
• GraphicFeatures
• Selectors
• Events
• ImageWidget
• Using fastplotlib in jupyter

Especially will all the changes in #473, would be nice to have a "map" that explains where everything fits into the package