fix(config): update variable names and remove unused imports

Refactor variable names to follow snake_case convention and remove unused imports across multiple files to improve code readability and maintainability.

harmony-rs/demo/vbox-opnsense/src/main.rs

@@ -28,8 +28,7 @@ async fn main() {
     };
 
     let opnsense = Arc::new(
-        harmony::infra::opnsense::OPNSenseFirewall::new(firewall, None, "lan", "root", "opnsense")
-            .await,
+        harmony::infra::opnsense::OPNSenseFirewall::new(firewall, None, "root", "opnsense").await,
     );
     let lan_subnet = Ipv4Addr::new(10, 100, 8, 0);
     let gateway_ipv4 = Ipv4Addr::new(10, 100, 8, 1);