chore(loo-4788): --debug flag

[notnmeyer]

there's been a couple times where the cli doesnt quite do what i expect and i wished i could see the request we were constructing. this adds a global --debug flag that print the relevant request details before making a request,

➜ loops contacts update -e nate@example.com -s false --debug
[debug] PUT https://app.loops.so/api/v1/contacts/update
[debug] Authorization: Bearer [REDACTED]
[debug] Content-Type: application/json
[debug] Body:
{
  "email": "nate@example.com",
  "subscribed": false
}
Updated.

[linear]

LOO-4788