feature: #1842 Add Currying Design Pattern (#2271)

* #1842 Setting up project and creating example classes. Issues running site and deploy

* #1842 Added unit tests

* #1842 Improved example

* #1842 Added UML class diagram

* #1842 Added comments to Genre class

* #1842 Improved readability of lambda function

* #1842 Started working on the README and created initial UML

* #1842 Added example to README

* #1842 Replaced prints with LOGGER

* #1842 Fixed typo in README

* #1842 Testing commit account

* #1842 Adding documentation to App class

* #1842 Improved documentation

* #1842 Added documentation to AppTest

* #1842 Fixing latex formating issue

* #1842 Improving the intent description

* #1842 Removed override methods from the UML diagram for clarity

* #1842 Renamed the SCI_FI enum

* #1842 Updated the currying pom.xml

* #1842 Removed unneeded comment

* #1842 Improving documentation and README

* Added review changes.

* Fixing build issues and added javadoc comments to functional interfaces.

* Removing code smells

* Removed unnecessary toString method

* Using lombok to reduce boiler plate.

* Fixed frontmatter.

* Removing function name code smell

* Fixed README typo

* Added book_creator test to improve coverage

Co-authored-by: Hugo Kat <u7286091@anu.edu.au>

currying/etc/currying.urm.puml

@@ -0,0 +1,39 @@
+@startuml
+package com.iluwatar.currying {
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class Book {
+    ~ BOOK_CREATOR : Function<Genre, Function<String, Function<String, Function<LocalDate, Book>>>> {static}
+    - author : String
+    - genre : Genre
+    - publicationDate : LocalDate
+    - title : String
+    ~ Book(genre : Genre, author : String, title : String, publicationDate : LocalDate)
+    + builder() : AddGenre {static}
+  }
+  interface AddAuthor {
+    + withAuthor(String) : AddTitle {abstract}
+  }
+  interface AddGenre {
+    + withGenre(Genre) : AddAuthor {abstract}
+  }
+  interface AddPublicationDate {
+    + withPublicationDate(LocalDate) : Book {abstract}
+  }
+  interface AddTitle {
+    + withTitle(String) : AddPublicationDate {abstract}
+  }
+  enum Genre {
+    + FANTASY {static}
+    + HORROR {static}
+    + SCI_FI {static}
+  }
+}
+Book -->  "-genre" Genre
+AddPublicationDate ..+ Book
+AddAuthor ..+ Book
+AddTitle ..+ Book
+AddGenre ..+ Book
+@enduml