feat: add load balancer score and frontend integration

- Implemented `OKDLoadBalancerScore` and integrated it as a `FrontendScore`.
- Added `FrontendScore` trait for TUI displayable scores.
- Implemented `Display` for `OKDLoadBalancerScore`.
- Updated `ScoreListWidget` to handle `FrontendScore` types.
- Included load balancer score in the TUI.

examples/nanodc/src/main.rs

@@ -12,6 +12,12 @@ async fn main() {
     let mut maestro = Maestro::new(inventory, topology);
 
     maestro.register_all(vec![
+        // ADD scores :
+        // 1. OPNSense setup scores
+        // 2. Bootstrap node setup
+        // 3. Control plane setup
+        // 4. Workers setup
+        // 5. Various tools and apps setup
         Box::new(SuccessScore {}),
         Box::new(ErrorScore {}),
         Box::new(PanicScore {}),