refactor: move decryptWord logic in Cypher

Author: vbetsch

src/main/java/io/github/vbetsch/codecracker/CodeCracker.java

@@ -12,10 +12,6 @@ public char encryptChar(char character) {
     }
 
     public String decryptWord(String string) {
-        StringBuilder stringBuilder = new StringBuilder();
-        for (char c : string.toCharArray()) {
-            stringBuilder.append(decryptLetter(c));
-        }
-        return stringBuilder.toString();
+        return cypher.decryptWord(string);
     }
 }

src/main/java/io/github/vbetsch/codecracker/Cypher.java

@@ -1,10 +1,5 @@
 package io.github.vbetsch.codecracker;
 
-import java.util.HashMap;
-import java.util.Map;
-
-import static java.util.Map.entry;
-
 public class Cypher {
     private final TranslationDictionary dictionary = new TranslationDictionary();
 
@@ -15,4 +10,12 @@ public char decryptLetter(char letter) {
     public char encryptChar(char character) {
         return dictionary.getEncryptions().get(character);
     }
+
+    public String decryptWord(String string) {
+        StringBuilder stringBuilder = new StringBuilder();
+        for (char c : string.toCharArray()) {
+            stringBuilder.append(decryptLetter(c));
+        }
+        return stringBuilder.toString();
+    }
 }