Add RequestFriendListPacket

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/protocol/tim/packet/action/RequestFriendListPacket.kt

+@file:Suppress("EXPERIMENTAL_API_USAGE")
+
+package net.mamoe.mirai.network.protocol.tim.packet.action
+
+import kotlinx.io.core.ByteReadPacket
+import net.mamoe.mirai.network.BotNetworkHandler
+import net.mamoe.mirai.network.protocol.tim.TIMProtocol
+import net.mamoe.mirai.network.protocol.tim.packet.*
+import net.mamoe.mirai.utils.io.writeZero
+
+class FriendList : Packet
+
+@PacketVersion(date = "2019.11.24", timVersion = "2.3.2 (21173)")
+object RequestFriendListPacket : SessionPacketFactory<FriendList>() {
+    operator fun invoke(
+        bot: UInt,
+        sessionKey: SessionKey
+    ): OutgoingPacket = buildSessionPacket(
+        bot, sessionKey, version = TIMProtocol.version0x02
+    ) {
+        writeByte(0x02)
+        writeZero(4)
+    }
+
+    override suspend fun ByteReadPacket.decode(id: PacketId, sequenceId: UShort, handler: BotNetworkHandler<*>): FriendList {
+
+        TODO()
+    }
+}
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