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/reactive_context.rs

@@ -158,6 +158,7 @@ impl ReactiveContext {
     ///
     /// ```rust, no_run
     /// # use dioxus::prelude::*;
+    /// # use dioxus_core::ReactiveContext;
     /// # use futures_util::StreamExt;
     /// fn use_simplified_memo(mut closure: impl FnMut() -> i32 + 'static) -> Signal<i32> {
     ///     use_hook(|| {