Try to add Sass support

src/assets/dioxus.toml

@@ -42,4 +42,7 @@ script = []
 
 # use binaryen.wasm-opt for output Wasm file
 # binaryen just will trigger in `web` platform
-binaryen = { wasm_opt = true }
+binaryen = { wasm_opt = true }
+
+# use sass auto will auto check sass file and build it.
+sass = { auto = true }