Restructure parser plug ins

Currently, the simulation parser plug-ins reside under parsers/electronic,atomistic,workflow,database, each pointing to their github project. This is problematic in case a code falls in more than one category. In addition, it has the unwanted effect of splitting modules from a package as in the case of quantumespresso, where we have the scf modules in electronicparsers/quantumespresso, the xspectra, phonon and epw modules under workflow.

• put all simulation parsers under parsers/simulation
• create github project in fairmat-nfdi and nomad-coe and provide a mechanism to sync them similar to nomad gitlab/github
• implement interface for packages with multiple modules and outputs