Add docs

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/BotNetworkHandler.kt

@@ -49,6 +49,8 @@ abstract class BotNetworkHandler : CoroutineScope {
 
     /**
      * 初始化获取好友列表等值.
+     *
+     * 不要使用这个 API. 它会在登录完成后被自动调用.
      */
     @MiraiInternalAPI
     open suspend fun init() {

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/BotFactoryJvm.kt

@@ -20,7 +20,14 @@ internal val factory: BotFactory = run {
     No BotFactory found. Please ensure that you've added dependency of protocol modules.
     Available modules:
     - net.mamoe:mirai-core-timpc
+    - net.mamoe:mirai-core-qqandroid (recommended)
     You should have at lease one protocol module installed.
+    -------------------------------------------------------
+    找不到 BotFactory. 请确保你依赖了至少一个协议模块.
+    可用的协议模块: 
+    - net.mamoe:mirai-core-timpc
+    - net.mamoe:mirai-core-qqandroid (推荐)
+    请添加上述任一模块的依赖(与 mirai-core 版本相同)
     """.trimIndent()
 )