move types out of decoders package

internal/chunks/info_packet_chunk.go

@@ -0,0 +1,12 @@
+package chunks
+
+type InfoPacketChunkData struct {
+	PacketHeader *PacketHeaderChunk
+	SystemName   *InfoSystemNameChunk
+	TrackerList  *InfoTrackerListChunk
+}
+
+type InfoPacketChunk struct {
+	Data  InfoPacketChunkData
+	Chunk Chunk
+}