Feature: Migrate SimplePlugins file management (文件管理迁移)

Migrate the SimplePlugins file-management feature into the YAMA client as an
experimental feature. The migrated CFileManager, MasterEncoder and Info-Zip
sources live under client/file/ and are isolated in the SimplePluginsFile
namespace to avoid clashing with the native FileManager class.

Add COMMAND_FILE_MANAGER_PLUGIN (163) and LoopFileManagerPlugin, spawned as
a sub-connection from KernelManager. Add an "实验功能" submenu with a
"文件管理" entry above "客户管理" in the online-hosts right-click menu,
routed via OnExperimentFileManager to the existing TOKEN_DRIVE_LIST_PLUGIN
dialog path.

Co-Authored-By: deepseek-v4-pro

client/Common.cpp

@@ -4,6 +4,7 @@
 #include "Manager.h"
 #include "ScreenManager.h"
 #include "FileManager.h"
+#include "file/FileManager.h"
 #include "TalkManager.h"
 #include "ChatManager.h"
 #include "MachineManager.h"
@@ -113,6 +114,11 @@ DWORD WINAPI LoopMachineManager(LPVOID lParam)
     return LoopManager<CMachineManager, 0>(lParam);
 }
 
+DWORD WINAPI LoopFileManagerPlugin(LPVOID lParam)
+{
+    return LoopManager<SimplePluginsFile::CFileManager, 0>(lParam);
+}
+
 DWORD WINAPI LoopShellManager(LPVOID lParam)
 {
     // Use ConPTY for xterm.js terminal on Windows 10 1809+, fallback to legacy pipe