Fix more examples to work with dioxus-native (#5179)

* Enable native for hotdog, file-explorer, and bluetooth-scanner examples

Signed-off-by: Nico Burns <nico@nicoburns.com>

* Fix crash in calculator example

Signed-off-by: Nico Burns <nico@nicoburns.com>

* Add config macro for native

* Add Config struct to dioxus-native

* Re-export dioxus-native as dioxus::native

* Fix calculator example to work with dioxus-native

* Fix calculator_mutable example to work with dioxus-native

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Signed-off-by: Nico Burns <nico@nicoburns.com>

examples/01-app-demos/hotdog/Cargo.toml

@@ -17,5 +17,6 @@ anyhow = { workspace = true }
 default = ["web", "server"]
 web = ["dioxus/web"]
 desktop = ["dioxus/desktop"]
+native = ["dioxus/native"]
 mobile = ["dioxus/mobile"]
 server = ["dioxus/server", "dep:rusqlite"]