uncloud CLI tool and 'machine add' command to bootstrap a new cluster

internal/cli/config/cluster.go

@@ -0,0 +1,9 @@
+package config
+
+import "uncloud/internal/secret"
+
+type Cluster struct {
+	Name     string              `toml:"-"`
+	Machines []MachineConnection `toml:"machines"`
+	Secret   secret.Secret       `toml:"secret"`
+}