feat(ui): Implement home dashboard

Replace the minimal index route with a lightweight home dashboard that
reads favorites and recently started runs through the home data provider
abstraction. 

Show favorites grouped by resource type, locally tracked recent runs, and
a link to `/organizations`.

Resolves #1598.

Signed-off-by: Jyrki Keisala <jyrki.keisala@doubleopen.io>

Author: Etsija

ui/src/routes/-components/home-empty-state.tsx

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2026 The ORT Server Authors (See <https://github.com/eclipse-apoapsis/ort-server/blob/main/NOTICE>)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * License-Filename: LICENSE
+ */
+
+import type { ReactNode } from 'react';
+
+export const HomeEmptyState = ({ children }: { children: ReactNode }) => (
+  <div className='text-muted-foreground rounded-lg border border-dashed p-6 text-sm'>
+    {children}
+  </div>
+);