Add method parameter type classes to all resources and services

[helenye-stripe]

Why?

This adds classes for all methods, with publicly available params explicitly listed for all params. This provides more clarity into what parameters are available per method, and adds RBIs (not yet included in gem) to describe each class.

What?

Adds the params classes as children of Stripe::RequestParams. Please review commit-by-commit. All manual changes should be obvious based on their commit name (the only large commit is the Generated changes commit). Sorry about the size here 😓 . If you are interested at peeking at the specific files in the generated commit, it will be easier to pull the branch.

Changelog

• Add method parameter classes for all resources and service methods.
  • This change is NOT breaking and is purely additive. The method parameter classes are not required, we still accept hashes as well as the new RequestParams classes. Any additional gated parameters are still available to pass via hash.

[xavdid-stripe]

looks great! super minor formatting suggestions, but 👍 otherwise.

I agree with the explicit initialization approach - the goal is strong typing and the better our intelisense, the better the experience.