added useNotification @lib, using it in EventType (#468)

lib/notification.ts

@@ -0,0 +1,49 @@
+import toast from "react-hot-toast";
+
+export default function showToast(message: string, variant: "success" | "warning" | "error") {
+  switch (variant) {
+    case "success":
+      toast.success(message, {
+        duration: 6000,
+        style: {
+          borderRadius: "2px",
+          background: "#333",
+          color: "#fff",
+          boxShadow: "none",
+        },
+      });
+      break;
+    case "error":
+      toast.error(message, {
+        duration: 6000,
+        style: {
+          borderRadius: "2px",
+          background: "#FEE2E2",
+          color: "#B91C1C",
+          boxShadow: "none",
+        },
+      });
+      break;
+    case "warning":
+      toast(message, {
+        duration: 6000,
+        style: {
+          borderRadius: "2px",
+          background: "#FFEDD5",
+          color: "#C2410C",
+          boxShadow: "none",
+        },
+      });
+      break;
+    default:
+      toast.success(message, {
+        duration: 6000,
+        style: {
+          borderRadius: "2px",
+          background: "#333",
+          color: "#fff",
+          boxShadow: "none",
+        },
+      });
+  }
+}