feature: #1261 Added collecting parameter design pattern (#2134)

* #1261 Added base directories, folders, and file for the collecting parameter design pattern.

* #1261 Added initial comment

* #1261 Added Maven Dependencies

* #1261 Added Maven Dependencies

* #1261 Finished README.md file

* #1261 Added tests

* #1261 Code adheres to the standard

* #1261 Code adheres to the standard

* #1261 Code adheres to the standard

* #1261
- Added table to README.md
- Explicitly state that result is the collecting parameter
- Improved applicability
- Separated PrinterItem.java from PrinterQueue.java
- Tests work now
- Giant comment split

* #1261 fixed programmatic example in README.md.

* #1261 updated class diagram

* #1261 Fixed everything.

* #1261 Minor edit to README.md.

* #1261 Minor edit to README.md.

* #1261 Minor updates.

* #1261 Fixed code style.

* #1261 Removed getPrinterQueue test

* #1261 Removed code smells

* #1261 Added UML plugin.

* #1261 Dependencies resolved.

* #1261 Specified the UML diagram paths. Perhaps this will work.

* #1261 pom.xml updated with UML wrapper. Maybe this will create class diagram when built?

* #1261 UML added.

* #1261
- README.md obeys the YAML requirements
- Typo in README.md fixed
- UMLWrapper removed from module pom.xml
- More comments added

Should be able to merge now :)

collecting-parameter/etc/collecting-parameter.urm.puml

@@ -0,0 +1,39 @@
+@startuml
+package com.iluwatar.collectingparameter {
+  class App {
+    ~ printerQueue : PrinterQueue {static}
+    + App()
+    + addValidA2Papers(printerItemsCollection : Queue<PrinterItem>) {static}
+    + addValidA3Papers(printerItemsCollection : Queue<PrinterItem>) {static}
+    + addValidA4Papers(printerItemsCollection : Queue<PrinterItem>) {static}
+    + main(args : String[]) {static}
+  }
+  ~enum PaperSizes {
+    + A2 {static}
+    + A3 {static}
+    + A4 {static}
+    + valueOf(name : String) : PaperSizes {static}
+    + values() : PaperSizes[] {static}
+  }
+  class PrinterItem {
+    ~ isColour : boolean
+    ~ isDoubleSided : boolean
+    ~ pageCount : int
+    ~ paperSize : PaperSizes
+    + PrinterItem(paperSize : PaperSizes, pageCount : int, isDoubleSided : boolean, isColour : boolean)
+  }
+  class PrinterQueue {
+    ~ currentInstance : PrinterQueue {static}
+    - printerItemQueue : Queue<PrinterItem>
+    - PrinterQueue()
+    + addPrinterItem(printerItem : PrinterItem)
+    + emptyQueue()
+    + getInstance() : PrinterQueue {static}
+    + getPrinterQueue() : Queue<PrinterItem>
+  }
+}
+PrinterQueue -->  "-currentInstance" PrinterQueue
+PrinterQueue -->  "-printerItemQueue" PrinterItem
+App -->  "-printerQueue" PrinterQueue
+PrinterItem -->  "-paperSize" PaperSizes
+@enduml