Move the document trait into a separate crate (#3035)

* add a default head method through eval
* remove the old document trait
* implement document for each platform
* pull out document into a dedicated crate to cut down on shared dependencies
---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/fullstack/src/document/server.rs

@@ -4,9 +4,8 @@
 
 use std::cell::RefCell;
 
-use dioxus_lib::{html::document::*, prelude::*};
+use dioxus_lib::{document::*, prelude::*};
 use dioxus_ssr::Renderer;
-use generational_box::GenerationalBox;
 use once_cell::sync::Lazy;
 use parking_lot::RwLock;
 
@@ -71,8 +70,8 @@ impl ServerDocument {
 }
 
 impl Document for ServerDocument {
-    fn new_evaluator(&self, js: String) -> GenerationalBox<Box<dyn Evaluator>> {
-        NoOpDocument.new_evaluator(js)
+    fn eval(&self, js: String) -> Eval {
+        NoOpDocument.eval(js)
     }
 
     fn set_title(&self, title: String) {
@@ -151,7 +150,7 @@ impl Document for ServerDocument {
         }
     }
 
-    fn create_link(&self, props: head::LinkProps) {
+    fn create_link(&self, props: LinkProps) {
         self.warn_if_streaming();
         self.serialize_for_hydration();
         self.0.borrow_mut().link.push(rsx! {
@@ -173,8 +172,4 @@ impl Document for ServerDocument {
             }
         })
     }
-
-    fn as_any(&self) -> &dyn std::any::Any {
-        self
-    }
 }