CLI: improve command descriptions in help output (#18486)

* CLI: clarify config vs configure descriptions

* CLI: improve top-level command descriptions

* CLI: make direct command help more descriptive

* CLI: add commands hint to root help

* CLI: show root help hint in implicit help output

* CLI: add help example for command-specific help

* CLI: tweak root subcommand marker spacing

* CLI: mark clawbot as subcommand root in help

* CLI: derive subcommand markers from registry metadata

* CLI: escape help regex CLI name

src/cli/update-cli.ts

@@ -18,7 +18,7 @@ export type { UpdateCommandOptions, UpdateStatusOptions, UpdateWizardOptions };
 export function registerUpdateCli(program: Command) {
   const update = program
     .command("update")
-    .description("Update OpenClaw to the latest version")
+    .description("Update OpenClaw and inspect update channel status")
     .option("--json", "Output result as JSON", false)
     .option("--no-restart", "Skip restarting the gateway service after a successful update")
     .option("--channel <stable|beta|dev>", "Persist update channel (git + npm)")