Add command for setting switches for potentiometry (pot_exp_start()). Add pot_experiment() for acquiring voltage measurements from RE input for potentiometry or OCP. (currently not called anywhere)

Initial implementation of preconditioning. Still a dummy function, needs to be added into main.c for each experiment command handler.

Added CSWV functionality to SWV. **Incompatible with dstat-interface commits before 1155414, due to extra scans variable added.** Changed the data output timing. Seems to still work, but need to check with electrochem.

Changed computer communication for more robustness and less superfluous error messages. Removed unused DSTAT1 file from project.

Renamed chronoamp function to ca_experiment. Finished command handlers. Adapted CA handler to use dynamic allocation.