add function to determine whether entry is relevant

EDPlayerJournal/BGS/TransactionParser.cs

@@ -747,6 +747,17 @@ public class TransactionParser {
         { Events.SupercruiseEntry, new SupercruiseEntryParser() },
     };
 
+    public bool IsRelevant(string entry) {
+        return ParserParts.ContainsKey(entry);
+    }
+
+    public bool IsRelevant(Entry e) {
+        if (e.Event == null) {
+            return false;
+        }
+        return IsRelevant(e.Event);
+    }
+
     public List<Transaction>? Parse(IEnumerable<Entry> entries) {
         TransactionList transactions = new();
         TransactionParserContext context = new();