use paste for messages longer than 512 and fix message sniping

src/main/java/cc/fascinated/bat/common/StringUtils.java

@@ -17,4 +17,21 @@ public class StringUtils {
         }
         return stringBuilder.toString();
     }
+
+    /**
+     * Escapes meta characters in a string
+     *
+     * @param inputString the input string
+     * @return the string with escaped meta characters
+     */
+    public static String escapeMetaCharacters(String inputString){
+        final String[] metaCharacters = {"\\","^","$","{","}","[","]","(",")",".","*","+","?","|","<",">","-","&","%"};
+
+        for (String metaCharacter : metaCharacters) {
+            if (inputString.contains(metaCharacter)) {
+                inputString = inputString.replace(metaCharacter, "\\" + metaCharacter);
+            }
+        }
+        return inputString;
+    }
 }