feat!: Added command to serve config files over tftp

This is a breaking change as the return type of cluster.nodes has
changed, resulting in old templates potentially no longer working.

src/cluster.rs

@@ -1,10 +1,10 @@
+use std::collections::HashMap;
 use std::net::Ipv4Addr;
 use std::path::PathBuf;
 use std::str::FromStr;
 
 use async_walkdir::WalkDir;
 use futures::StreamExt;
-use futures::future::join_all;
 use futures::stream::FuturesUnordered;
 use minijinja::Environment;
 use optional_struct::{Applicable, optional_struct};
@@ -77,7 +77,7 @@ struct ClusterDeserialize {
 pub struct Cluster {
     pub(crate) name: String,
     pub(crate) version: Version,
-    nodes: Vec<Node>,
+    nodes: HashMap<String, Node>,
     cluster_env: ClusterEnv,
     pub(crate) control_plane_ip: Ipv4Addr,
     pub(crate) secrets_file: PathBuf,
@@ -122,22 +122,23 @@ impl Cluster {
         let cluster = Self {
             name: cluster_name.into(),
             version: cluster.version,
-            nodes: vec![],
+            nodes: Default::default(),
             cluster_env: cluster.cluster_env,
             control_plane_ip: cluster.control_plane_ip,
             secrets_file,
         };
 
-        let nodes = nodes
-            .iter()
-            .map(|name| async { Node::get(name, env, &cluster, &default, &base).await });
+        let nodes = nodes.iter().map(|name| async {
+            let node = Node::get(name, env, &cluster, &default, &base).await;
+            (node.hostname().to_owned(), node)
+        });
 
         let nodes = FuturesUnordered::from_iter(nodes).collect().await;
 
         Self { nodes, ..cluster }
     }
 
-    pub async fn get_all() -> Vec<Cluster> {
+    pub async fn get_all() -> HashMap<String, Cluster> {
         let env = PathEnvironment::new_patches();
 
         let names: Vec<_> = WalkDir::new(get_talos_path().join("clusters"))
@@ -162,17 +163,26 @@ impl Cluster {
             .await;
 
         // Get the clusters concurrently
-        join_all(names.iter().map(|name| {
+        FuturesUnordered::from_iter(names.iter().map(|name| {
             let env = env.clone();
             let name = name.clone();
 
-            async move { Cluster::get(&name, &env).await }
+            async move {
+                let cluster = Cluster::get(&name, &env).await;
+
+                (name, cluster)
+            }
         }))
+        .collect()
         .await
     }
 
-    pub fn nodes(&self) -> &[Node] {
-        &self.nodes
+    pub fn nodes(&self) -> impl Iterator<Item = &Node> {
+        self.nodes.values()
+    }
+
+    pub fn node(&self, node: &str) -> Option<&Node> {
+        self.nodes.get(node)
     }
 
     pub async fn talosconfig(&self) -> String {