feat: add page for Bench (`/benches`)

[18alantom]

• [x] Benches sidebar option
• [ ] Benches tabs:
  • [x] Sites
  • [x] Patches
  • [x] Apps
  • [x] Jobs
  • [x] Processes
  • [x] Logs
  • [ ] Bench Config
  • [ ] Analytics
• [ ] Links to Bench page

[18alantom]

PR too long, will merge and add rest in the next PR