restructure: flatten workspace nesting, move devcontainer to root

- backend/workspaces/backend/ → backend/
- backend/workspaces/frontend/ → frontend/
- backend/.devcontainer/ + .vscode/ → repo root (where VS Code expects them)
- loose scripts/SQL files → scripts/
- replace nested git repo with single repo at project root
- update docker-compose.yml build context and devcontainer.json path
- add root .gitignore

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/persons/+page.server.ts

@@ -0,0 +1,18 @@
+import { redirect } from '@sveltejs/kit';
+import { env } from '$env/dynamic/private';
+
+export async function load({ url, fetch }) {
+    const q = url.searchParams.get('q') || '';
+    const baseUrl = env.API_INTERNAL_URL || 'http://localhost:8080';
+
+    // Query Parameter an Backend durchreichen
+    const apiUrl = new URL(`${baseUrl}/api/persons`);
+    if (q) apiUrl.searchParams.set('q', q);
+
+    const res = await fetch(apiUrl.toString());
+
+    if (!res.ok) return { persons: [] };
+
+    const persons = await res.json();
+    return { persons, q };
+}