feat: implement k3d cluster management

- Adds functionality to download, install, and manage k3d clusters.
- Includes methods for downloading the latest release, creating clusters, and verifying cluster existence.
- Implements `ensure_k3d_installed`, `get_latest_release_tag`, `download_latest_release`, `is_k3d_installed`, `verify_cluster_exists`, `create_cluster` and `create_kubernetes_client`.
- Provides a `get_client` method to access the Kubernetes client.
- Includes unit tests for download and installation.
- Adds handling for different operating systems.
- Improves error handling and logging.
- Introduces a `K3d` struct to encapsulate k3d cluster management logic.
- Adds the ability to specify the cluster name during K3d initialization.

examples/lamp/src/main.rs

@@ -1,5 +1,6 @@
 use harmony::{
     data::Version,
+    inventory::Inventory,
     maestro::Maestro,
     modules::lamp::{LAMPConfig, LAMPScore},
     topology::{K8sAnywhereTopology, Url},
@@ -17,7 +18,12 @@ async fn main() {
         },
     };
 
-    let mut maestro = Maestro::<K8sAnywhereTopology>::load_from_env();
+    let mut maestro = Maestro::<K8sAnywhereTopology>::initialize(
+        Inventory::autoload(),
+        K8sAnywhereTopology::new(),
+    )
+    .await
+    .unwrap();
     maestro.register_all(vec![Box::new(lamp_stack)]);
     harmony_tui::init(maestro).await.unwrap();
 }