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>

omsorgapp/electron/backend/employeesClient.cjs

@@ -0,0 +1,28 @@
+const { request } = require('./httpClient.cjs');
+
+// Kapselt /api/employees von omsorgCore (EmployeesController). Feldnamen sind
+// camelCase, da ASP.NET Core standardmäßig camelCase-JSON ausgibt.
+async function listEmployees(accessToken, { search, status, employmentType, page = 1, pageSize = 20 } = {}) {
+  const params = new URLSearchParams();
+  if (search) params.set('search', search);
+  if (status) params.set('status', status);
+  if (employmentType) params.set('employmentType', employmentType);
+  params.set('page', page);
+  params.set('pageSize', pageSize);
+
+  return request('GET', `/api/employees?${params.toString()}`, { accessToken });
+}
+
+async function createEmployee(accessToken, payload) {
+  return request('POST', '/api/employees', { body: payload, accessToken });
+}
+
+async function getEmployee(accessToken, id) {
+  return request('GET', `/api/employees/${id}`, { accessToken });
+}
+
+async function updateEmployee(accessToken, id, payload) {
+  return request('PUT', `/api/employees/${id}`, { body: payload, accessToken });
+}
+
+module.exports = { listEmployees, createEmployee, getEmployee, updateEmployee };