initial debug draw packet; data for the tests are entirely fabricated as we have no instances of this packet in the wild (#1170)

src/main/scala/net/psforever/packet/GamePacketOpcode.scala

@@ -487,7 +487,7 @@ object GamePacketOpcode extends Enumeration {
       case 0x99 => noDecoder(EmpireIncentivesMessage)
       case 0x9a => game.InvalidTerrainMessage.decode
       case 0x9b => noDecoder(SyncMessage)
-      case 0x9c => noDecoder(DebugDrawMessage)
+      case 0x9c => game.DebugDrawMessage.decode
       case 0x9d => noDecoder(SoulMarkMessage)
       case 0x9e => noDecoder(UplinkPositionEvent)
       case 0x9f => game.HotSpotUpdateMessage.decode

src/main/scala/net/psforever/packet/game/DebugDrawMessage.scala

@@ -0,0 +1,32 @@
+// Copyright (c) 2024 PSForever
+package net.psforever.packet.game
+
+import net.psforever.packet.GamePacketOpcode.Type
+import net.psforever.packet.{GamePacketOpcode, Marshallable, PlanetSideGamePacket}
+import net.psforever.types.Vector3
+import scodec.bits.BitVector
+import scodec.{Attempt, Codec}
+import scodec.codecs._
+
+final case class DebugDrawMessage(
+                                   unk1: Int,
+                                   unk2: Long,
+                                   unk3: Long,
+                                   unk4: Long,
+                                   unk5: List[Vector3]
+                                 )
+  extends PlanetSideGamePacket {
+  type Packet = DebugDrawMessage
+  def opcode: Type = GamePacketOpcode.DebugDrawMessage
+  def encode: Attempt[BitVector] = DebugDrawMessage.encode(this)
+}
+
+object DebugDrawMessage extends Marshallable[DebugDrawMessage] {
+  implicit val codec: Codec[DebugDrawMessage] = (
+    ("unk1" | uint(bits = 3)) ::
+      ("unk2" | ulongL(bits = 32)) ::
+      ("unk3" | ulongL(bits = 32)) ::
+      ("unk4" | ulongL(bits = 32)) ::
+      ("unk5" | listOfN(uint2, Vector3.codec_pos))
+    ).as[DebugDrawMessage]
+}