feat(occ): improve config:list help text/descriptions

- Make language more descriptive, precise, and consistent
- Add examples

Signed-off-by: Josh <josh.t.richards@gmail.com>

Author: joshtrichards

core/Command/Config/ListConfigs.php

@@ -37,21 +37,46 @@ protected function configure() {
 
 		$this
 			->setName('config:list')
-			->setDescription('List all configs')
+			->setDescription('List system and app configuration values')
 			->addArgument(
 				'app',
 				InputArgument::OPTIONAL,
-				'Name of the app ("system" to get the config.php values, "all" for all apps and system)',
+				'What to list: an app name, "system" for system configuration values, or "all" for system and all app configs',
 				'all'
 			)
 			->addOption(
 				'private',
 				null,
 				InputOption::VALUE_NONE,
-				'Use this option when you want to include sensitive configs like passwords, salts, ...'
+				'Include sensitive configuration values like passwords and secrets'
 			)
-			->addOption('migrate', null, InputOption::VALUE_NONE, 'Rename config keys of all enabled apps, based on ConfigLexicon')
-		;
+			->addOption(
+				'migrate',
+				null,
+				InputOption::VALUE_NONE,
+				'Migrate config keys using the ConfigLexicon before listing',
+			)
+			->setHelp(<<<'HELP'
+The <info>%command.name%</info> command lists system and app configuration values.
+
+For system, this shows the effective system configuration as loaded by
+Nextcloud. It may include values from <info>config.php</info>, additional <info>*.config.php</info>
+files, and <info>NC_*</info> environment variables.
+
+Examples:
+
+  <info>php occ config:list</info>
+    List all system and app configuration values
+
+  <info>php occ config:list system</info>
+    List only system configuration values
+
+  <info>php occ config:list files_sharing</info>
+    List configuration values for the files_sharing app
+
+  <info>php occ config:list --private</info>
+    List all system and app configuration values, including sensitive values
+HELP);
 	}
 
 	#[\Override]