adds activity timeline

web/src/lib/models/activity.ts

@@ -0,0 +1,17 @@
+interface Activity {
+    id: string;
+    trail_id: string;
+    name: string,
+    description: string;
+    date: string;
+    gpx: string;
+    photos: string[];
+    distance: number;
+    duration: number;
+    elevation_gain: number;
+    elevation_loss: number;
+    type: "trail" | "summit_log"
+    author: string;
+}
+
+export { type Activity }