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/core/README.md

@@ -81,7 +81,7 @@ fn main() {
 
 ## Contributing
 
-- Check out the website [section on contributing](https://dioxuslabs.com/learn/0.5/contributing).
+- Check out the website [section on contributing](https://dioxuslabs.com/learn/0.6/contributing).
 - Report issues on our [issue tracker](https://github.com/dioxuslabs/dioxus/issues).
 - [Join](https://discord.gg/XgGxMSkvUM) the discord and ask questions!