add wlx-common lib, move GeneralConfig into it

wlx-common/src/overlays.rs

@@ -0,0 +1,17 @@
+use idmap_derive::IntegerId;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, IntegerId, Serialize, Deserialize)]
+pub enum ToastTopic {
+	System,
+	DesktopNotification,
+	XSNotification,
+	IpdChange,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+pub enum ToastDisplayMethod {
+	Hide,
+	Center,
+	Watch,
+}