Add deprecated constructor for migration

mirai-core-api/src/commonMain/kotlin/message/data/ForwardMessage.kt

@@ -22,6 +22,7 @@ import net.mamoe.mirai.contact.nameCardOrNick
 import net.mamoe.mirai.event.events.MessageEvent
 import net.mamoe.mirai.message.data.ForwardMessage.DisplayStrategy
 import net.mamoe.mirai.utils.MiraiExperimentalApi
+import net.mamoe.mirai.utils.PlannedRemoval
 import net.mamoe.mirai.utils.currentTimeSeconds
 import net.mamoe.mirai.utils.safeCast
 
@@ -109,6 +110,30 @@ public data class ForwardMessage(
         return "[mirai:forward:NOT_IMPLEMENTED]" // TODO: 2020/12/3 ForwardMessage.contentToString()
     }
 
+    @PlannedRemoval("2.0-M2")
+    @Deprecated(
+        "Use RawForwardMessage and render manually or use buildForwardMessage",
+        ReplaceWith(
+            "RawForwardMessage(nodeList).render(displayStrategy)",
+            "net.mamoe.mirai.message.data.RawForwardMessage"
+        )
+    )
+    @JvmOverloads
+    public constructor(
+        /**
+         * 消息列表
+         */
+        nodeList: Collection<INode>,
+        displayStrategy: DisplayStrategy = DisplayStrategy.Default
+    ) : this(
+        preview = displayStrategy.generatePreview(RawForwardMessage(nodeList.map(INode::toNode))),
+        title = displayStrategy.generateTitle(RawForwardMessage(nodeList.map(INode::toNode))),
+        brief = displayStrategy.generateBrief(RawForwardMessage(nodeList.map(INode::toNode))),
+        source = displayStrategy.generateSource(RawForwardMessage(nodeList.map(INode::toNode))),
+        summary = displayStrategy.generateSummary(RawForwardMessage(nodeList.map(INode::toNode))),
+        nodeList = nodeList.map(INode::toNode),
+    )
+
     /**
      * @see ForwardMessage
      */
@@ -560,3 +585,7 @@ public class ForwardMessageBuilder private constructor(
 
 @Suppress("NOTHING_TO_INLINE")
 internal inline fun Int.toLongUnsigned(): Long = this.toLong().and(0xFFFF_FFFF)
+
+private fun ForwardMessage.INode.toNode(): ForwardMessage.Node {
+    return ForwardMessage.Node(senderId, time, senderName, message)
+}