Fetch Netlify function and edge-function logs via websocket

Documented steps

1. Authenticate with a Netlify access token.
2. For function logs, open wss://socketeer.services.netlify.com/function/logs and send {"access_token": ..., "account_id": ..., "function_id": ..., "site_id": ..., "from"?:, "to"?:}.
3. For edge-function logs, open wss://socketeer.services.netlify.com/edge-function/logs and send {"access_token": ..., "deploy_id": ..., "site_id": ..., "since": ...}.
4. Consume the streaming log lines.