generate user key for new cluster and add it to peers on bootstrap machine

internal/cli/config/machine.go

@@ -1,8 +1,11 @@
 package config
 
+import "uncloud/internal/secret"
+
 type MachineConnection struct {
-	User   string `toml:"user,omitempty"`
-	Host   string `toml:"host"`
-	Port   int    `toml:"port"`
-	SSHKey string `toml:"ssh_key,omitempty"`
+	User      string        `toml:"user,omitempty"`
+	Host      string        `toml:"host"`
+	Port      int           `toml:"port"`
+	SSHKey    string        `toml:"ssh_key,omitempty"`
+	PublicKey secret.Secret `toml:"public_key,omitempty"`
 }