src/cli/command.rs: add help command

src/bin/catar.rs

@@ -185,5 +185,5 @@ fn main() {
             .into()
         );
 
-    run_cli_command(&cmd_def.into());
+    run_cli_command(cmd_def.into());
 }

src/bin/proxmox-backup-client.rs

@@ -236,5 +236,5 @@ fn main() {
         .insert("garbage-collect".to_owned(), garbage_collect_cmd_def.into())
         .insert("list".to_owned(), list_cmd_def.into());
 
-    run_cli_command(&cmd_def.into());
+    run_cli_command(cmd_def.into());
 }

src/bin/proxmox-backup-manager.rs

@@ -51,5 +51,5 @@ fn main() {
         .insert("datastore".to_owned(), datastore_commands())
         .insert("garbage-collection".to_owned(), garbage_collection_commands());
 
-    run_cli_command(&cmd_def.into());
+    run_cli_command(cmd_def.into());
 }