feat(im-sdk): 添加 Flutter IM SDK 和 Go 服务端 SDK

- 实现了完整的 Flutter IM SDK，支持消息发送、历史记录、会话管理、好友功能和群组操作
- 添加了 Go 服务端 SDK 骨架，包含登录、消息发送、撤回、编辑等核心功能
- 实现了认证和授权机制，支持 token 管理和请求签名验证
- 添加了会话列表、好友申请、群组管理和消息搜索功能
- 提供了用户资料管理、头像上传和账户导入导出功能
- 实现了消息撤回、编辑和已读状态管理功能
- 添加了群组加入申请、审批和成员管理功能
- 提供了消息历史分页查询和定位功能
- 实现了会话置顶、免打扰和草稿保存功能
- 添加了用户和群组搜索功能，支持关键词检索

.hvigor/outputs/logs/details/details.json

@@ -7,6 +7,7 @@
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+        "IS_BYTE_CODE_HAR": true,
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@@ -16,14 +17,15 @@
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+        "IS_INCREMENTAL_MODULE": false
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     "NATIVE_COMPILER": "Default",
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+    "BUILD_MODE": "debug",
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@@ -32,27 +34,50 @@
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@@ -63,7 +88,7 @@
       "ENABLE_CPP_FUNCTION_LEVEL_INCREMENTAL": false
     },
     "CONFIG_PROPERTIES": {},
-    "BUILD_ID": "202604282229113860",
+    "BUILD_ID": "202604290016471500",
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 }