Refactored the code in order to look for nodes with load gadget such that
their pressure is negative and attempt to rescue the situation doing
more step of computation.
Removed an useless interface for the system solver and an ``empty'' project.
Refactor some code in order to manage the repetition of fixing
negative pressures for nodes with load gadgets.
Refactor the method that handle the translation from adimensional to
dimensional pressures in order to be functional and not imperative.
Moved the node handlers into their dedicated file.
Extract the initialization of unknowns follow a strategy pattern.
Rename the handlers for network iteration (before in the name
appears ``node'' for edge iteration too).
Refactor in a lazy way the initialization strategy with min/max pressure
for unknowns.
Move around some code in order to organize it in #region ... #endregion
Implement the remapping on an existing network given a map that goes
from nodes to nodes.