client: add 'snapshot notes show/update' command

to show and update snapshot notes from the cli

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

src/bin/proxmox_backup_client/mod.rs

@@ -8,6 +8,8 @@ mod task;
 pub use task::*;
 mod catalog;
 pub use catalog::*;
+mod snapshot;
+pub use snapshot::*;
 
 pub mod key;