Add insecure flag to skip ssl verification when warming static cache

[o1y]

This PR adds an --insecure flag to the static:warm command to skip SSL verification. The --insecure option is useful to warm the static cache even when running Statamic with self-signed certs (e.g. behind a reverse proxy).

[what-the-diff]

PR Summary

• Added a new option to skip SSL verification
  A new option has been introduced to allow the user to bypass SSL certificate checks.

• Updated client configuration with the new option
  The client configuration has been updated to incorporate the new option for skipping SSL verification.

[jasonvarga]

Can you extract a method? Those stacking negatives are hard to grok.

"If not insecure and not local." 🤯

'verify' => $this->shouldVerifySsl(),