Remove dioxus-lib, fix doc imports (#4438)

* remove dioxus lib

* inline some doc items

* fix tests

* test docs

* Fix doc tests

* Pull out dioxus/lib feature

* disable logger and devtools in library feature

* fix cargo doc

* fix cargo doc

packages/core/src/runtime.rs

@@ -448,6 +448,7 @@ impl Runtime {
 ///
 /// ```rust
 /// use dioxus::prelude::*;
+/// use dioxus_core::{Runtime, RuntimeGuard};
 ///
 /// fn main() {
 ///     let virtual_dom = VirtualDom::new(app);