Feat: first work for rsx vscode ext

packages/vscode-ext/README.md

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+# VSCode support for Dioxus html macro
+
+This macro provides syntax highlighting for the html! macro used in Dioxus projects. Users should feel at home writing html and css alongside the custom attributes used by Dioxus.
+
+
+## How it works
+This extension works by:
+- Creating a custom HTML ruleset for dioxus html! nodes
+- Request forwarding content
+
+
+## Resources
+Request forwarding is performed intelligently by the extension. 
+Requests within the html! tag are forwarded to the html language service. It's simple and doesn't 
+
+https://code.visualstudio.com/api/language-extensions/embedded-languages#language-services
+