integrated hetzner client in repo + showcase of using scope for 'cleaner' scripts

src/lib.rs

@@ -46,6 +46,9 @@ pub use sal_kubernetes as kubernetes;
 #[cfg(feature = "mycelium")]
 pub use sal_mycelium as mycelium;
 
+#[cfg(feature = "hetzner")]
+pub use sal_hetzner as hetzner;
+
 #[cfg(feature = "net")]
 pub use sal_net as net;