Draft: hubbard + refactoring + more data passed via pseudopotentials dict argument

Checklist

• I have read the contribution guidelines.
• [todo] Unit tests have been added for any new or changed code, and the test suite passes. Note: Your request will likely not be merged without the appropriate tests.

adds the capability of writing the Hubbard card with the new Espresso input format, plus starts refactoring of write_espresso_in splitting it in shorter functions. Allow for pseudopotential values to be dictionaries containing more information. todo:

• Complete checking that everything works
• Add tests for the refactored parts
• Add and update tests for what concerns Hubbard
• reorganize commits with final rebase