feature: add sv-router, page structure and redirect to home from any other page

src/routes/router.ts

@@ -0,0 +1,23 @@
+import { createRouter } from 'sv-router';
+import Home from './Home.svelte';
+import Redirect from './Redirect.svelte';
+
+/**
+ * Single-page router for glyphdiff.
+ *
+ * Currently exposes one route; structure exists so additional routes can be
+ * added without touching the app shell.
+ */
+export const {
+    isActive,
+    navigate,
+    p,
+    preload,
+    route,
+} = createRouter({
+    '/': Home,
+    /**
+     * Any unmatched path redirects to home until additional routes exist.
+     */
+    '*notfound': Redirect,
+});