feat: open browser during serve with "--open"

Cargo.toml

@@ -82,6 +82,7 @@ dioxus-html = { version = "0.3", features = ["hot-reload-context"] }
 dioxus-core = { version = "0.3", features = ["serialize"] }
 dioxus-autofmt = "0.3.0"
 rsx-rosetta = { version = "0.3" }
+open = "4.1.0"
 
 [[bin]]
 path = "src/main.rs"