* 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
