feat: basic messaging implementation

src/messages.rs

@@ -0,0 +1,9 @@
+use crate::user::UserUnwrapped;
+
+#[allow(dead_code)]
+#[derive(Debug, Clone)]
+pub struct Message {
+    pub sender: UserUnwrapped,
+    pub receiver: String,
+    pub text: String,
+}