fix(licenses): print help when no subcommand is specified (#5751)

close #5745

.changeset/rotten-mayflies-enjoy.md

@@ -0,0 +1,6 @@
+---
+"@pnpm/plugin-commands-licenses": patch
+"pnpm": patch
+---
+
+`pnpm licenses` should print help, not just an error message [#5745](https://github.com/pnpm/pnpm/issues/5745).

reviewing/plugin-commands-licenses/src/licenses.ts

@@ -85,7 +85,9 @@ export async function handler (
   params: string[] = []
 ) {
   if (params.length === 0) {
-    throw new PnpmError('LICENCES_NO_SUBCOMMAND', 'Please specify the subcommand')
+    throw new PnpmError('LICENCES_NO_SUBCOMMAND', 'Please specify the subcommand', {
+      hint: help(),
+    })
   }
   switch (params[0]) {
   case 'list':