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.

harmony_tui/src/widget/score.rs

@@ -1,10 +1,13 @@
 use std::sync::{Arc, RwLock};
 
 use crossterm::event::{Event, KeyCode, KeyEventKind};
-use harmony::{modules::okd::load_balancer::OKDLoadBalancerScore, score::Score, topology::{LoadBalancer, Topology}};
+use harmony::{score::Score, topology::Topology};
 use log::{info, warn};
 use ratatui::{
-    layout::Rect, style::{Style, Stylize}, widgets::{List, ListItem, ListState, StatefulWidget, Widget}, Frame
+    Frame,
+    layout::Rect,
+    style::{Style, Stylize},
+    widgets::{List, ListItem, ListState, StatefulWidget, Widget},
 };
 use tokio::sync::mpsc;
 
@@ -23,19 +26,20 @@ struct Execution<T: Topology> {
     score: Box<dyn Score<T>>,
 }
 
-impl <T: Topology + LoadBalancer> FrontendScore<T> for OKDLoadBalancerScore {}
-
 #[derive(Debug)]
 pub(crate) struct ScoreListWidget<T: Topology> {
     list_state: Arc<RwLock<ListState>>,
-    scores: Vec<Box<dyn FrontendScore<T>>>,
+    scores: Vec<Box<dyn Score<T>>>,
     execution: Option<Execution<T>>,
     execution_history: Vec<Execution<T>>,
     sender: mpsc::Sender<HarmonyTuiEvent<T>>,
 }
 
 impl<T: Topology + std::fmt::Debug> ScoreListWidget<T> {
-    pub(crate) fn new(scores: Vec<Box<dyn Score<T>>>, sender: mpsc::Sender<HarmonyTuiEvent<T>>) -> Self {
+    pub(crate) fn new(
+        scores: Vec<Box<dyn Score<T>>>,
+        sender: mpsc::Sender<HarmonyTuiEvent<T>>,
+    ) -> Self {
         let mut list_state = ListState::default();
         list_state.select_first();
         let list_state = Arc::new(RwLock::new(list_state));
@@ -141,4 +145,3 @@ impl<T: Topology> Widget for &ScoreListWidget<T> {
 fn score_to_list_item<'a, T: Topology>(score: &'a Box<dyn Score<T>>) -> ListItem<'a> {
     ListItem::new(score.name())
 }
-