fix: Adding mapper and fix compilation issue

Changes description

Before this PR https://github.com/Decathlon/vitamin-ios/pull/137 payment assets used to not be generated in a consistent manner. Since this PR I have to adjust the library code to work with the new and the old names. In order to not disrupt the already existing implementation and usage of this.

At the time there is something that I didn't properly understand and it was due to a limitation of git with case sensitivity.

Context

The project don't compile without this.

Checklist

[x] Make sure you are requesting to pull a topic/feature/bugfix branch. Please, don't request directly from your main!
[x] Check commits & PR names matches our requested structure. It must follow the https://www.conventionalcommits.org pattern.
[x] Check your code additions will fail neither code linting checks.
[x] I have reviewed the submitted code.
[x] I have tested on an iPhone device/simulator.
[x] I have tested on an iPad device/simulator.
[x] If it includes design changes, please ask for a review design-system-core-team-design GitHub team.

Does this introduce a breaking change?

The main goal of this code is to prevent breaking changes.

Decathlon / vitamin-ios