added some emojis to the separators to add some more flair to the site
moved around + renamed files in a way that (hopefully) helps to understand the tree structure when making changes
Added separator name as a prefix to each file. For ex. all "API Integration" docs are now named "api_integration-*"
I changed the "Deposits + User Journeys" to the "Getting Started" file, and moved the "Onboarding FAQs" to the "Other" section.
I created another "Concepts" section which details the Architecture, and trading concepts (Margin, Rewards, Fees)
Generally I don't like meaty docs anywhere near intros, it's scary to see when you go to a site at first. So I made these changes with that in mind