switch to a Document trait and introduce Script/Head/Style/Meta components (#2635)

* switch to a Document trait and introduce Script/Head/Style/Meta components

* Fix desktop title

* Insert special elements into the head during the inital SSR render

* Make all head component attributes optional

* hydrate head elements

* improve the server streaming head warning

* Document fullstack head hydration approach

* deduplicate head elements by href

* move Link into head::Link

* document head components

* add meta and title examples

* Fix a few doc examples

* fix formatting

* Add title to playwright tests

* serde is optional on web, but it is enabled by hydrate

* remove leftover console log

packages/dioxus/Cargo.toml

@@ -33,7 +33,7 @@ axum = { workspace = true, optional = true }
 dioxus-hot-reload = { workspace = true, optional = true }
 
 [features]
-default = ["macro", "html", "hot-reload", "signals", "hooks", "launch", "mounted", "file_engine", "eval"]
+default = ["macro", "html", "hot-reload", "signals", "hooks", "launch", "mounted", "file_engine", "document"]
 minimal = ["macro", "html", "signals", "hooks", "launch"]
 signals = ["dep:dioxus-signals"]
 macro = ["dep:dioxus-core-macro"]
@@ -42,7 +42,7 @@ hooks = ["dep:dioxus-hooks"]
 hot-reload = ["dep:dioxus-hot-reload", "dioxus-web?/hot_reload", "dioxus-fullstack?/hot-reload"]
 mounted = ["dioxus-web?/mounted", "dioxus-html?/mounted"]
 file_engine = ["dioxus-web?/file_engine"]
-eval = ["dioxus-web?/eval", "dioxus-html?/eval"]
+document = ["dioxus-web?/document", "dioxus-html?/document"]
 
 launch = ["dep:dioxus-config-macro"]
 router = ["dep:dioxus-router"]