add es version to status output

TODO.md

@@ -4,4 +4,4 @@
 - Fix index names custom completion
 - add cluster default <name> which would add a flag to the config, so that no -C is needed subsequently
 - add `cluster stats` from `/_cluster/stats` like mem, procs, open files, num indices, shards etc
-- add version[s] to `cluster status`
+  or add these to `cluster status`, maybe add a `--stats` to include stats there?

pkg/es/cluster.go

@@ -129,11 +129,20 @@ func ClusterStatus(conf *cfg.Config) error {
 
 		slog.Debug("ES result", "cluster health", res)
 
+		info, err := es.Info().
+			Header("content-type", "application/json").
+			Header("accept", "application/json").
+			Do(context.Background())
+		if err != nil {
+			return fmt.Errorf("failed to get cluster info: %s", err)
+		}
+
 		table := NewTable(2, 5)
 		table.Addheaders(cluster, "status")
 
 		table.entries = [][]string{
 			{"Cluster Name", Colorize(*&res.Status.Name, res.ClusterName)},
+			{"ES Version", fmt.Sprintf("%s", info.Version.Int)},
 			{"Active Shards", fmt.Sprintf("%d", res.ActiveShards)},
 			{"Active Primary Shards", fmt.Sprintf("%d", res.ActivePrimaryShards)},
 			{"Indicies", fmt.Sprintf("%d", len(res.Indices))},