Docs should mention loader behavior on native platforms

[ceopaludetto]

trafficstars

Docs should mention how loaders behave on native platforms in comparison to web.

They only run in build time or they work similarly to SSR? I think newcomers expect a similar behavior to remix/react-router loaders. What you think?

[natew]

Yep, something we need to do. The way they work currently should be similar to web:

• ssg happens at compile-time and is included in the bundle
• ssr happens on load and fetches from the server each time
• spa happens on load and fetches from the server each time

but honestly need to verify this more thoroughly alongside adding tests and documenting.

[natew]

Added docs to the site!