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/document/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "dioxus-document"
+edition = "2021"
+version.workspace = true
+
+[dependencies]
+dioxus-core = { workspace = true }
+dioxus-core-types = { workspace = true }
+dioxus-core-macro = { workspace = true }
+dioxus-html = { workspace = true }
+tracing = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+futures-channel = { workspace = true }
+futures-util.workspace = true
+generational-box.workspace = true
+
+[build-dependencies]
+lazy-js-bundle = { workspace = true }
+
+[dev-dependencies]
+dioxus = { workspace = true }