* fix a few new clippy lints
* Add query segment example
* Add trait documentation
* Change core package to root package
The core package contains the virtual dom implementation ([here](https://github.com/DioxusLabs/dioxus/tree/master/packages/core)). Root package might be a more clear way to refer to the main directory
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Co-authored-by: Evan Almloff <evanalmloff@gmail.com>
