deck class implemented and test classes implemented

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

src/main/java/Model/Deck.java

+package Model;public class Deck {
+}

src/test/java/Model/CardTest.java

+import static org.junit.jupiter.api.Assertions.*;
+class CardTest {
+  
+}
\ No newline at end of file

src/test/java/Model/DeckTest.java

+import static org.junit.jupiter.api.Assertions.*;
+class DeckTest {
+  
+}
\ No newline at end of file