fix(autoresearch): swallow browser launcher errors in /autoresearch export

[unexge]

I use pi-autoresearch on my Linux box - which doesn't have GUI & xdg-open - and /autoresearch export crashes with:

Error: spawn xdg-open ENOENT
    at ChildProcess._handle.onexit (node:internal/child_process:286:19)
    at onErrorNT (node:internal/child_process:507:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)
Emitted 'error' event on ChildProcess instance at:
    at ChildProcess._handle.onexit (node:internal/child_process:292:12)
    at onErrorNT (node:internal/child_process:507:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'spawn xdg-open',
  path: 'xdg-open',
  spawnargs: [ 'http://127.0.0.1:33535/' ]
}

This change updates openInBrowser to swallow that exception and since as a next step the URL is printed, I can just port forward that to my local machine and access the UI.