Separate CP admin panel into independent Vite project at /cp/

- New /cp/ Vite project with own package.json, Dockerfile, tailwind config
- Migrated CpLoginPage, CpLayout, AdminDashboard → cp/src/ (self-contained)
- cp/src/lib/utils.ts has only what CP needs (cn, PLAN_LABELS, PLAN_COLORS)
- cp/src/data/mockData.ts has Hotel/User types and mock data
- cp/ builds to nginx static container (hotelsync-cp)
- docker-compose.yml: added cp service
- nginx: added cp.hotelsync.ru → hotelsync-cp:80 (SSL block ready for certbot)
- deploy.yml: builds hotelsync-cp:latest and restarts container on push
- Cleaned src/App.tsx: removed IS_CP branch, CpLoginPage/CpLayout/AdminDashboard imports

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

cp/nginx.conf

@@ -0,0 +1,19 @@
+server {
+    listen 80;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # React SPA — все пути отдают index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Кэшировать статику
+    location ~* \.(js|css|png|svg|ico|woff2?)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;
+}