feat: added rider categories feature (#1995)

Author: cka-y

main/src/main/java/org/mobilitydata/gtfsvalidator/reportsummary/model/FeedMetadata.java

@@ -54,6 +54,8 @@ public class FeedMetadata {
           new Pair<>(new FeatureMetadata("Zone-Based Fares", "Fares"), GtfsArea.FILENAME),
           new Pair<>(new FeatureMetadata("Fare Transfers", "Fares"), GtfsFareTransferRule.FILENAME),
           new Pair<>(new FeatureMetadata("Time-Based Fares", "Fares"), GtfsTimeframe.FILENAME),
+          new Pair<>(
+              new FeatureMetadata("Rider Categories", "Fares"), GtfsRiderCategories.FILENAME),
           new Pair<>(
               new FeatureMetadata("Booking Rules", "Flexible Services"), GtfsBookingRules.FILENAME),
           new Pair<>(