fix: add missing type for GetSellerListResponse

[jingerpie]

Summary

• Fix Item type from single object to Array<{...}> to correctly represent multiple items
• Add missing fields: HasMoreItems, PositiveFeedbackPercent, LiveAuctionAuthorized, MerchandizingPref, MotorsDealer
• Mark optional fields that may not always be present: FeedbackRatingStar, SellerLevel, UserAnonymized
• Remove redundant StandardOutputFields properties duplicated in 3 response interfaces

Test plan

• Build passes (npm run build)
• Verify GetSellerList API responses match updated types
• Run existing tests (npm run test)

[jingerpie]

Hi, few month ago, I added these types, I notice one of them has a missing type. Please merge this, thank you so much!

[jingerpie]

@dantio Hi I notice this isnt merge, any problem? Also a reminder that this project uses axios, there is a recent critical issues in regard to it. Are you considering to set version limit or perhaps use fecth?

[dantio]

Are you considering to set version limit or perhaps use fecth?
Axios is locked to 1.13.5 in package-lock. I do not use any CI that automatically release the lib.

Yes, I plan to migrate to fetch (probably with ky)