Add Yew (#1688)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

readme.md

@@ -298,6 +298,7 @@
 - [Seed](https://github.com/seed-rs/awesome-seed-rs#readme) - Rust framework for creating web apps running in WebAssembly.
 - [Web Performance Budget](https://github.com/pajaydev/awesome-performance-budget#readme) - Techniques to ensure certain performance metrics for a website.
 - [Web Animation](https://github.com/sergey-pimenov/awesome-web-animation#readme) - Animations in the browser with JavaScript, CSS, SVG, etc.
+- [Yew](https://github.com/jetli/awesome-yew#readme) - Rust framework inspired by Elm and React for creating multi-threaded frontend web apps with WebAssembly.
 
 ## Back-End Development