feat request: add the licensing api

[JimmyLv]

thanks for this awesome project, have you tried to add these related APIs? https://docs.lemonsqueezy.com/help/licensing/license-api

[NuroDev]

This is something I do plan on adding support for at some point in the future. However doing so will take slightly more work than most of the existing API endpoint as, from a quick look, it looks like they have implemented a new API structure which is not similar to existing response structure I have built all of the existing modules around.