Feature Request: Support for /unified/quick_repayment endpoint

[Sora233]

Description

Hi maintainers,

Could we please add support for the /unified/quick_repayment endpoint in this SDK?

Currently, we are integrating the Unified Account features and need this specific endpoint to handle rapid repayments for borrowed assets efficiently. Having native support for it within gateapi-go would be highly appreciated.

Reference Documentation

The official API documentation for this endpoint can be found here:

• https://www.gate.com/docs/developers/apiv4/en/unified/#quick-repayment