docs: remove GeneralUpdate.ClientCore, merge ClientCore and Common into Core (#67)

- Delete GeneralUpdate.ClientCore.md (3 copies) — component merged into Core
- Rewrite Core component overview: Core is now the unified component
  encompassing client-side management (formerly ClientCore), upgrade
  execution, and shared infrastructure (formerly Common)
- Update all code examples: replace using GeneralUpdate.ClientCore /
  using GeneralUpdate.Common.* with using GeneralUpdate.Core
- Add migration notes explaining the merge for existing users
- Update GeneralTracer: Common merged into Core, no separate package needed
- Update GeneralClient.OSS: namespace Core, remove ClientCore dependency
- Update UpgradeHub: namespace Core.Hubs, remove ClientCore references
- Fix cross-page links: ClientCore -> Core in Differential, Extension, PacketTool
- Clean all references to removed components (excluding historical releaselog)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: JusterZhu

website/docs/doc/GeneralClient.OSS.md

@@ -4,15 +4,15 @@ sidebar_position: 9
 
 ### Definition
 
-Namespace: GeneralUpdate.ClientCore
+Namespace: GeneralUpdate.Core
 
-Assembly: GeneralUpdate.ClientCore.dll
+Assembly: GeneralUpdate.Core.dll
 
 
 
 **OSS**
 
-OSS stands for Object Storage Service. For those developing server-side technology stacks, this term is likely familiar, as major cloud service providers offer similar services. Simply put, it's a file server. Examples include Alibaba Cloud OSS, Tencent Cloud COS, and Huawei Cloud OBS. While they have different names, their functionalities are quite similar. The new feature of this update component is implemented in a very similar manner, so we chose OSS to name this feature, making it easy for developers to quickly understand its purpose (requires the use of components GeneralUpdate.ClientCore, GeneralUpdate.Core).
+OSS stands for Object Storage Service. For those developing server-side technology stacks, this term is likely familiar, as major cloud service providers offer similar services. Simply put, it's a file server. Examples include Alibaba Cloud OSS, Tencent Cloud COS, and Huawei Cloud OBS. While they have different names, their functionalities are quite similar. The new feature of this update component is implemented in a very similar manner, so we chose OSS to name this feature, making it easy for developers to quickly understand its purpose (requires the use of the GeneralUpdate.Core component).
 
 
 
@@ -84,8 +84,8 @@ GeneralClientOSS :
 
 ```c#
 using System.Text;
-using GeneralUpdate.ClientCore;
-using GeneralUpdate.Common.Shared.Object;
+using GeneralUpdate.Core;
+
 
 var paramsOSS = new GlobalConfigInfoOSS
 {

website/docs/doc/GeneralTracer.md

@@ -4,13 +4,13 @@ sidebar_position: 8
 
 ### GeneralTracer
 
-Namespace: GeneralUpdate.Common.Shared
+> **合并说明**：`GeneralUpdate.Common` 已合并到 `GeneralUpdate.Core`。`GeneralTracer` 现在位于 `GeneralUpdate.Core` 命名空间内，引用 `GeneralUpdate.Core` 包即可自动获得，无需单独引用。
 
-Assembly: GeneralUpdate.Common.dll
+命名空间: `GeneralUpdate.Core`
 
+程序集: `GeneralUpdate.Core.dll`
 
-
-**GeneralUpdate.Common** is a common component that provides core underlying code. It generally does not need to be referenced manually and will be imported automatically when you reference **GeneralUpdate.ClientCore** or **GeneralUpdate.Core**.
+`GeneralTracer` 提供组件内部异常信息和执行流程的追踪输出。它默认启用，引用 `GeneralUpdate.Core` 时会自动包含。
 
 ```c#
 public static class GeneralTracer