Implementing fifo channel, and command structure.

src/commands.rs

@@ -0,0 +1,18 @@
+use std::fmt::Display;
+
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub enum Command {
+    SendMessage { channel: String, message: String },
+}
+
+impl Display for Command {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::SendMessage { channel, message } => {
+                write!(f, "[{channel}]: {message}")
+            }
+        }
+    }
+}