Add `Message.repeat`, make `Message.times` inline

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/Message.kt

@@ -7,7 +7,7 @@
  * https://github.com/mamoe/mirai/blob/master/LICENSE
  */
 
-@file:Suppress("MemberVisibilityCanBePrivate", "unused", "EXPERIMENTAL_API_USAGE")
+@file:Suppress("MemberVisibilityCanBePrivate", "unused", "EXPERIMENTAL_API_USAGE", "NOTHING_TO_INLINE")
 
 package net.mamoe.mirai.message.data
 
@@ -115,12 +115,14 @@ suspend inline fun <C : Contact> Message.sendTo(contact: C): MessageReceipt<C> {
     return contact.sendMessage(this)
 }
 
-operator fun Message.times(count: Int): MessageChain {
+fun Message.repeat(count: Int): MessageChain {
     return buildMessageChain(count) {
-        add(this@times)
+        add(this@repeat)
     }
 }
 
+inline operator fun Message.times(count: Int): MessageChain = this.repeat(count)
+
 interface SingleMessage : Message
 
 /**