Create a "Philosophy" documentation section

[endigo9740]

We should aim to implement a philosophy section that goes into the details for why Skeleton exists, what makes it unique, and why we choose to implement things the way we do.

Topics to cover may include:

• Why use Tailwind
• Why is the core a Tailwind plugin
• Our preference for native-first, whenever possible
• Why we opt for opt-in strategies (classes, features, etc)
• The benefits of our opinionated component and style props
• ....