Update Transak Widget URL

[saltict]

🚨 Mandatory Action Required
API based Transak widget loading: Your backend must call the Create Widget URL API with apiKey, access-token, and referrerDomain
The API will return a secure widgetUrl, which should then be loaded on the client-side.
Refer to the guides below for detailed information and the integration process.

🔹 Resources
Widget URL Migration Guide: https://transak.link/widgeturl-guide
API Documentation: https://transak.link/create-widgeturl

[Thiendekaco]

Hi @tunghp2002 , please follow the organizational structure used for Coinbase in the following folders of the monorepos:

• Backend: libs/small-features/src/modules/proxy/coinbase
• SDK: libs/subwallet-services-sdk/src/services/onramp-coinbase.ts