feat(harmony): add lamp server module and refactor dhcpd tests

Implement LAMP server module with basic configuration.
Refactor and remove commented out Dhcpd struct and associated tests in opnsense/xml_utils.
Ensure codebase adheres to best practices and maintainability standards.

harmony/src/domain/topology/mod.rs

@@ -14,7 +14,7 @@ pub use http::*;
 pub use network::*;
 pub use tftp::*;
 
-use std::{net::IpAddr, sync::Arc};
+use std::net::IpAddr;
 
 pub type IpAddress = IpAddr;