[APP] Twilio - Add Native OAuth Integration

### App / Service

Twilio (https://www.twilio.com)

### Request

Currently, Pipedream does not provide native OAuth2 integration for connecting to Twilio. At present, users must manually generate and use API Key SID and Secret, which does not align with standardized OAuth2 flows used by many other services.

#### Why OAuth is Needed

- Easier and more secure authentication for user accounts.
- Streamlines connecting Twilio accounts for workflow automations.
- More consistent with integration patterns of other major SaaS apps on Pipedream.
- Reduces risk associated with manual key/secret management.

#### Any Existing Docs or References

- [Twilio API Keys Overview](https://www.twilio.com/docs/iam/api-keys)
- [Twilio Access Tokens](https://www.twilio.com/docs/iam/access-tokens)

#### Additional Notes

If OAuth is not possible due to Twilio limitations, please consider updating documentation or supporting alternate, user-friendly authentication flows.