Reorganize into monorepo layout, move mitarbeiter-app to legacy reference

Consolidates the previously separate omsorgapp and omsorgCore repos
(each had their own nested .git with GitHub history) plus the old
root-level website/mitarbeiter-app into a single monorepo, matching
the structure already documented in the root CLAUDE.md. Also moves
the PHP employee app aside as omsorgWeb/mitarbeiter-app-legacy/ to
serve as a template for a ground-up rewrite.

Fixes .gitignore in the same pass: the config-secrets/uploads/data
patterns were unanchored (relative to repo root, not depth-agnostic),
so they silently stopped matching once the app moved under omsorgWeb/.
Patterns are now **/-prefixed and cover both mitarbeiter-app and
mitarbeiter-app-legacy, keeping DB/SMTP credentials and uploaded
employee documents out of version control.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

omsorgWeb/mitarbeiter-app-legacy/pages/downloads.php

@@ -0,0 +1,28 @@
+<?php
+require_once __DIR__ . '/../lib/auth.php';
+require_once __DIR__ . '/../lib/layout.php';
+require_login();
+
+$downloads = db()->query('SELECT * FROM downloads ORDER BY sort_order ASC, id ASC')->fetchAll();
+
+layout_start('OMSORG – Downloads', 'downloads');
+?>
+      <h1 class="main-title">Down<span>loads</span></h1>
+      <p class="main-sub">Dokumente und Formulare zum Herunterladen.</p>
+
+      <?php if (empty($downloads)): ?>
+        <p style="color:var(--muted);margin-top:40px">Noch keine Downloads verfügbar.</p>
+      <?php else: ?>
+        <div class="downloads-grid">
+          <?php foreach ($downloads as $dl): ?>
+          <div class="glass download-card">
+            <h3 class="download-card-title"><?= e($dl['title']) ?></h3>
+            <?php if ($dl['description'] !== ''): ?>
+              <p class="download-card-desc"><?= e($dl['description']) ?></p>
+            <?php endif; ?>
+            <a href="download-serve.php?id=<?= (int)$dl['id'] ?>" class="btn download-btn">&#8595; Herunterladen</a>
+          </div>
+          <?php endforeach; ?>
+        </div>
+      <?php endif; ?>
+<?php layout_end(); ?>