adds new trail page

web/src/lib/stores/waypoint_store.ts

@@ -0,0 +1,4 @@
+import { Waypoint } from "$lib/models/waypoint";
+import { writable, type Writable } from "svelte/store";
+
+export const waypoint: Writable<Waypoint> = writable(new Waypoint(0, 0));