feat: add serde derive to Score types

This commit adds `serde` dependency and derives `Serialize` trait for `Score` types. This is necessary for serialization and deserialization of these types, which is required to display Scores to various user interfaces

- Added `serde` dependency to `harmony_types/Cargo.toml`.
- Added `serde::Serialize` derive macro to `MacAddress` in `harmony_types/src/lib.rs`.
- Added `serde::Serialize` derive macro to `Config` in `opnsense-config/src/config/config.rs`.
- Added `serde::Serialize` derive macro to `Score` in `harmony_types/src/lib.rs`.
- Added `serde::Serialize` derive macro to `Config` and `Score` in relevant modules.
- Added placeholder `todo!()` implementations for `serialize` methods. These will be implemented in future commits.

examples/lamp/src/main.rs

@@ -2,8 +2,7 @@ use harmony::{
     data::Version,
     maestro::Maestro,
     modules::lamp::{LAMPConfig, LAMPScore},
-    score::Score,
-    topology::{HAClusterTopology, Topology, Url},
+    topology::{HAClusterTopology, Url},
 };
 
 #[tokio::main]
@@ -23,7 +22,3 @@ async fn main() {
         .await
         .unwrap();
 }
-
-fn clone_score<T: Topology, S: Score<T> + Clone + 'static>(score: S) -> Box<S> {
-    Box::new(score.clone())
-}