feat: add error types

src/error.rs

@@ -0,0 +1,15 @@
+/// Errors that can occur when using the suck channel
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Error {
+    /// Channel has been closed gracefully
+    ChannelClosed,
+
+    /// Producer has disconnected unexpectedly
+    ProducerDisconnected,
+
+    /// No value source has been set
+    NoSource,
+
+    /// Closure execution panicked
+    ClosurePanic,
+}