Take a module, converge a node after a preview, and return it to adopted, from the command line and the API (hq ADR 0100)

cmd/mesh-controller/main.go

@@ -98,6 +98,12 @@ func run() error {
 		return moduleCommand(ctx, args[1:])
 	case "assign", "unassign":
 		return assignCommand(ctx, args[0], args[1:])
+	case "take":
+		return takeCommand(ctx, args[1:])
+	case "converge":
+		return convergeCommand(ctx, args[1:])
+	case "adopt":
+		return adoptCommand(ctx, args[1:])
 	case "settings":
 		return settingsCommand(ctx, args[1:])
 	case "secret":
@@ -155,6 +161,9 @@ func usage() {
   api --issuer URL [--listen A]  assign and unassign over http, for a surface that is not here
   assign <node> <module>         put a module on a node
   unassign <node> <module>       take it off
+  take <node> <module>           cut a module over on an adopted node, once its data has moved
+  converge <node> [--yes] [--filter nftables]   preview, then make, an adopted node converged
+  adopt <node>                   return a converged node to adopted; what was taken stays taken
   settings set <module> <file>   what a module's config should say, for the whole mesh
   settings set <module> <file> --node <n>   ...or for one machine
   settings clear <module> [--node <n>]      take a layer away