`read_pcs_file` missing features

[MLopez-Ibanez]

• [x] Forbidden configurations (needs additional output)
• [x] Transformations (such as "log")
• [ ] Default configuration (needs additional output)
• [ ] Multiple conditions for the same parameter (should be joined by &)
• [ ] Others?

[MLopez-Ibanez]

Forbidden configurations can now be returned via "[forbidden]"