Update all docs links to 0.6, release 0.6 (#3225)

* update doc links to 0.6
* add new splash pages for crates
* update keyword features
* remove some unnecessary links

packages/ssr/README.md

@@ -9,8 +9,8 @@
 
 This crate is a part of the broader Dioxus ecosystem. For more resources about Dioxus, check out:
 
-- [Getting Started](https://dioxuslabs.com/learn/0.5/getting_started)
-- [Book](https://dioxuslabs.com/learn/0.5/)
+- [Getting Started](https://dioxuslabs.com/learn/0.6/getting_started)
+- [Book](https://dioxuslabs.com/learn/0.6/)
 - [Examples](https://github.com/DioxusLabs/dioxus/tree/main/examples)
 
 ## Overview