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/actions/news-action.php

@@ -0,0 +1,34 @@
+<?php
+require_once __DIR__ . '/../lib/auth.php';
+require_once __DIR__ . '/../lib/db.php';
+require_admin();
+
+$action = $_POST['_action'] ?? '';
+
+if ($action === 'add') {
+    $title = trim((string)($_POST['title'] ?? ''));
+    $text  = trim((string)($_POST['text']  ?? ''));
+    $date  = trim((string)($_POST['date']  ?? '')) ?: date('Y-m-d');
+    if ($title === '' || $text === '') {
+        header('Location: ../pages/admin.php?tab=news&err=empty');
+        exit;
+    }
+    $stmt = db()->prepare(
+        'INSERT INTO news (title, text, date, created_at) VALUES (?, ?, ?, ?)'
+    );
+    $stmt->execute([$title, $text, $date, date('c')]);
+    header('Location: ../pages/admin.php?tab=news&ok=added');
+    exit;
+}
+
+if ($action === 'delete') {
+    $id = (int)($_POST['news_id'] ?? 0);
+    if ($id > 0) {
+        db()->prepare('DELETE FROM news WHERE id = ?')->execute([$id]);
+    }
+    header('Location: ../pages/admin.php?tab=news&ok=deleted');
+    exit;
+}
+
+header('Location: ../pages/admin.php?tab=news');
+exit;