Add malus (sanity) to work to force the character to rest

[MaxDac]

Currently, withdrawing money from work does not cost anything in terms of fatigue or sanity. This can allow a character to work indefinitely without forcing them to rest. To avoid this, there are two possibilities:

• ~Use the Sanity as a marker that would reduce progressively as the character withdraws. Rest can force them to rest.~
• Introduce another character stat, fatigue, that would recover only by resting, and lost through work and plays, so that the character would be forced to rest as well.

[MaxDac]

Chosen the second approach: fatigue will be added as a stat for the character, and the only way to restore it will be to rest. The fatigue will be 0 by default, every time:

• The character works;
• The character participate to a quest; will accumulate fatigue.

Above certain level, the character will:

• Not be able to work (if above 80);
• They'll lose dices to all throws automatically (1 dice at 80, 1 more dice every 10 values to a minimum of 2).