Add a fictional cipher from "supergirl"

lib/utils/DBIKC.dart

@@ -0,0 +1,61 @@
+class DoubleBreastedInterruptedKeyCipher {
+  static String encode(String text) {
+    // Define the vowel and consonant lists
+    List<String> vowels = ['A', 'E', 'I', 'O', 'U'];
+    List<String> consonants = [
+      'B',
+      'C',
+      'D',
+      'F',
+      'G',
+      'H',
+      'J',
+      'K',
+      'L',
+      'M',
+      'N',
+      'P',
+      'Q',
+      'R',
+      'S',
+      'T',
+      'V',
+      'W',
+      'X',
+      'Y',
+      'Z'
+    ];
+
+    // Create a map for easy lookups
+    Map<String, String> vowelMap = {};
+    Map<String, String> consonantMap = {};
+
+    // Fill the maps by mirroring the lists
+    for (int i = 0; i < vowels.length; i++) {
+      vowelMap[vowels[i]] = vowels[vowels.length - 1 - i];
+    }
+
+    for (int i = 0; i < consonants.length; i++) {
+      consonantMap[consonants[i]] = consonants[consonants.length - 1 - i];
+    }
+
+    // Encode the text
+    StringBuffer encoded = StringBuffer();
+    for (int i = 0; i < text.length; i++) {
+      String char = text[i].toUpperCase();
+      if (vowelMap.containsKey(char)) {
+        encoded.write(vowelMap[char]);
+      } else if (consonantMap.containsKey(char)) {
+        encoded.write(consonantMap[char]);
+      } else {
+        encoded.write(char); // Keep non-alphabet characters unchanged
+      }
+    }
+    return encoded.toString();
+  }
+
+  static String decode(String text) {
+    // The decoding process is the same as encoding for this cipher
+    return encode(text);
+  }
+}