Some fixes for the examples and the crate

examples/hotspot/src/main.rs

@@ -0,0 +1,24 @@
+extern crate wifi_rs;
+
+use std::io;
+use wifi_rs::WiFi;
+use wifi_rs::prelude::*;
+
+fn main() -> Result<(), io::Error> {
+    let config = Some(Config {
+        interface: Some("wlo1"),
+    });
+
+    let mut wifi = WiFi::new(config);
+    let config = HotspotConfig::new(Some(HotspotBand::Bg), Some(Channel::One));
+
+    wifi.create_hotspot(
+        "test-hotspot",
+        "password",
+        Some(
+            &config
+        )
+    );
+
+    Ok(())
+}