Update ChickenBarn Project

See merge request paysafe-interns-valentin-2023/paysafe-interns-valentin-martin/oop/filip-filchev-java-oop-chicken-barn-2023!1

# Conflicts:
#   .idea/misc.xml
#   src/Main.java
#   src/com/farm/barn/Barn.java
#   src/com/farm/barn/observer/BarnObserverFactory.java
#   src/com/farm/barn/writer/BarnWriter.java
#   src/com/farm/evolvable/Chicken.java
#   src/com/farm/evolvable/Egg.java
#   src/com/farm/evolvable/function/EvolvableFunctionFactory.java
#   src/com/farm/week/Week.java
#   src/com/farm/week/factory/WeekFactory.java
#   src/com/farm/week/type/WeekType.java

Remove static Calling of the BarnObserver Singleton

Add Demo Engine
Fix some Classes

Now extends PrintWriter with auto flush

Rename EGG Status to HATCHABLE
Remove Comparable<> extend from Evolvable

Move all static Function returning Methods to Classes in apropriate Packages
Reorder Classes in Packages
Add Predicate and Function Classes
Rename Chicken Package

Rename public static Function Methods
Add a Function Method that parses a Family Tree to String
Remove incrementAges method from the Barn class
Fix DefaultChicken Bug

Move Status from Chicken Class to AbstractEvolvable Class

Fix getting Family Tree

Add InvalidAgeException Handling in Factory of Method

Add Exception Throwing to the Factory of Method

Saves the Barn Ouput to a File

Observes when a Chicken dies and when an Egg hatches
Holds count of Chickens and Eggs

Change Interface name

Determines if a Chicken is ALIVE, LAYABLE or DEAD

Add getter
Fix static Factory of Method

Create grow() Method that return a List of the Evolvables for each week

End of workday 20/7/2023