Add *-remove rule limits

add operation limits to the remove rules as they were generating invalid rules

pkg/rule/rule.go

@@ -182,6 +182,12 @@ func AppendRules(items map[string]int, operation string, bypass bool, debug bool
 	// remove will remove characters then append
 	case "rule-append-remove", "append-remove":
 		for key, value := range items {
+			if len(key) > 15 {
+				if debug {
+					fmt.Fprintf(os.Stderr, "[!] Error: Key is too long for append-remove operation\n")
+				}
+				continue
+			}
 			rule := CharToRule(key, "$")
 			remove := LenToRule(key, "]")
 			appendRemoveRule := FormatCharToRuleOutput(remove, rule)
@@ -241,6 +247,12 @@ func PrependRules(items map[string]int, operation string, bypass bool, debug boo
 	// remove will remove characters then prepend
 	case "rule-prepend-remove", "prepend-remove":
 		for key, value := range items {
+			if len(key) > 15 {
+				if debug {
+					fmt.Fprintf(os.Stderr, "[!] Error: Key is too long for prepend-remove operation\n")
+				}
+				continue
+			}
 			rule := CharToRule(utils.ReverseString(key), "^")
 			remove := LenToRule(key, "[")
 			prependRemoveRule := FormatCharToRuleOutput(remove, rule)