Improve Sustenet as a whole, primarily the Client.

Create macros for client. Integrate joining a cluster.

Improve both master and cluster.

Remove the FromCluster and ToCluster packet sections.

Create a ClusterInfo struct to track clusters easier.

rust/client/src/macros.rs

@@ -0,0 +1,47 @@
+/// This calls loop and select! in a single macro.
+#[macro_export]
+macro_rules! lselect {
+    ($($select_body:tt)*) => {
+        loop {
+            tokio::select! {
+                $($select_body)*
+            }
+        }
+    };
+}
+
+/// This reads a u8 for the length and then calls read_exact
+/// to read the bytes then converts it to a string.
+/// 
+/// This is used in a loop to continue if an error occurs.
+#[macro_export]
+macro_rules! lread_string {
+    ($reader:expr, $error:expr, $name:expr) => {
+        {
+        let len = match $reader.read_u8().await {
+            Ok(len) => len,
+            Err(e) => {
+                $error(format!("Failed to read the {} len. {:?}", $name, e).as_str());
+                continue;
+            }
+        } as usize;
+
+        let mut val = vec![0u8; len];
+        match $reader.read_exact(&mut val).await {
+            Ok(_) => (),
+            Err(e) => {
+                $error(format!("Failed to read the {}. {:?}", $name, e).as_str());
+                continue;
+            }
+        };
+
+        match String::from_utf8(val) {
+            Ok(val) => val,
+            Err(e) => {
+                $error(format!("Failed to convert the {} to a String. {:?}", $name, e).as_str());
+                continue;
+            }
+        }
+        }
+    };
+}