implemented encryptedTextKeyChain function in encrypter & decrypter

you can now change the encryption operation in one function

src/lib/decrypter.c

@@ -109,7 +109,7 @@ outputFlags decryptText(char *text, char *keyNew)
     //DECRYPT TEXT
     for (int i = 0; i < textKeyChainLength; i++)
     {
-        textKeyChain[i] -= encryptedTextKeyChain[i];
+        textKeyChain[i] = encryptionOperation(textKeyChain[i], encryptedTextKeyChain[i]);
     }
 
     //FIX (CLEAN) returningText

src/lib/encrypter.c

@@ -90,7 +90,7 @@ outputFlags encryptText(char *text, char *keyNew)
     //ACTUALLY ENCRYPT TEXT
     for (int i = 0; i < (int) strlen(text); i++)
     {
-        textKeyChain[i] -= (int) text[i];
+        textKeyChain[i] = encryptionOperation(textKeyChain[i], (int) text[i]);
     }
 
     //COUNT REQUIRED SIZE FOR returningText

src/lib/flags.c

@@ -71,4 +71,6 @@ int encryptionOperation(int text, int encryptedText)
 {
     //CHANGE THE '-' (MINUS) OPERATOR TO SOMETHING YOU WANT TO USE I GUESS
     return text - encryptedText;
+
+    //I DO NOT RECOMMEND CHANGING THIS, BUT IF YOU WANT TO, XOR IS A GOOD OPERATOR (IDK IF OTHERS WORK lmao)
 }