Add placeholder BalloonLiveParser class in track parser package

src/main/java/dev/coph/flightscore/backend/track/parser/BalloonLiveParser.java

@@ -0,0 +1,7 @@
+package dev.coph.flightscore.backend.track.parser;
+
+public class BalloonLiveParser {
+
+    
+
+}