clean up prelude (#4416)

* clear away prelude on dioxus

* clippy

* wip - drop prelude from dioxus-html

* docs clippy

* wip

* more fixe

* delete all preludes

* doc...

* better export

* merge some imports

* fewer global imports

* global incremental renderer

* fix cargo doc

examples/fullstack-desktop/src/main.rs

@@ -4,7 +4,7 @@ use dioxus::prelude::*;
 fn main() {
     // Set the url of the server where server functions are hosted.
     #[cfg(not(feature = "server"))]
-    dioxus::fullstack::prelude::server_fn::client::set_server_url("http://127.0.0.1:8080");
+    dioxus::fullstack::set_server_url("http://127.0.0.1:8080");
     dioxus::launch(app);
 }