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/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "omsorg-business-controls-pro",
+  "version": "0.1.1",
+  "private": true,
+  "description": "Omsorg Business Controls Pro - Release 0.1.1 Foundation",
+  "main": "electron/main.cjs",
+  "scripts": {
+    "dev": "concurrently -k \"vite --host 127.0.0.1\" \"wait-on http://127.0.0.1:5173 && electron .\"",
+    "web": "vite --host 127.0.0.1",
+    "start": "electron ."
+  },
+  "dependencies": {
+    "@vitejs/plugin-react": "latest",
+    "vite": "latest",
+    "typescript": "latest",
+    "react": "latest",
+    "react-dom": "latest",
+    "electron": "latest",
+    "lucide-react": "latest"
+  },
+  "devDependencies": {
+    "concurrently": "latest",
+    "wait-on": "latest"
+  }
+}