Import methods

[philouail]

Here are the implementation of the generics function loadResults() and its respective method for the parameters RDataParam and PlainTextParam.

I still have bugs in order to build examples/unit test with the spectra files path, I need some help regarding that.

PS: the github checks crash because of the new Spectra functions i added to the namespace (e.g dataStorageBasePath, dataStorageBasePath<-).