Draft: Split validation and decoding, named holes, CI/CD

Description

Split the validation and the decoding, this make the error messages a bit nicer.

Also, now its possible to use named holes:

{
    "Hello": "Hello {user}!"
}

This increases the readability for translation files. Another side effect of this is that the dont require the params to be enumerated.

CI/CD

We will run the test for the generation and a test for the examples in a ci pipeline.