implements trail sharing

web/src/lib/models/trail_share.ts

@@ -0,0 +1,17 @@
+import type { User } from "./user";
+
+export class TrailShare {
+    id?: string;
+    user: string;
+    trail: string;
+    permission: "view" | "edit"
+    expand?: {
+        user: User
+    }
+
+    constructor(user: string, trail: string, permission: "view" | "edit") {
+        this.user = user;
+        this.trail = trail;
+        this.permission = permission
+    }
+}