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

packages/web/src/ts/eval.ts

@@ -2,7 +2,7 @@ import {
   DioxusChannel,
   Channel,
   WeakDioxusChannel,
-} from "../../../html/src/ts/eval";
+} from "../../../document/src/ts/eval";
 
 export class WebDioxusChannel extends DioxusChannel {
   js_to_rust: Channel;