Renaming module folders is not synchronized with the Java Project Manager and may result in renaming ghost folders

重現匯入 Java 專案後的重新命名，然後從報告中描述的 Java: Clean Workspace Cache 命令與語言伺服器同步行為開始。完成的標準是 Java Project Manager 反映新的資料夾名稱而不重新建立舊資料夾，且重新命名後的資料夾仍維持連結為 Java 模組。

Description: The Java Project Management view fails to synchronize with file system changes. When renaming a module folder via the file explorer, the Java Language Server does not detect or reflect the rename operation, resulting in a desynchronization between the project metadata and the actual file system state. The recreation of the old folder is a side effect of this synchronization failure.

Build Tool: Maven
OS: Windows 11 25H2

Steps to Reproduce:

1. Open a workspace folder that contains multiple Java sub-projects (modules).
2. Wait for the Java Language Server to finish importing and indexing all projects.
3. Rename one of the sub-project folders (e.g., rename old-module-name to new-module-name) using the OS file
   explorer or the IDE's built-in file tree.
4. Observe the Java Project Explorer/Manager view.

Actual Result:

• The Java Project Manager still displays old-module-name.
• The system recreates a new folder named old-module-name in the file system containing target and other
  directories (side effect of the sync failure).
• The new-module-name folder is treated as an unlinked plain folder rather than a Java module.

Expected Behavior:

• The Java Project Manager should detect the folder rename operation.
• The project metadata should be updated or re-indexed to reflect the name change, maintaining synchronization with
  the file system.

Additional Context:
Running the command "Java: Clean Workspace Cache" and restarting the language server resolves the issue and
correctly reflects the new folder name. This confirms that the Language Server's cache retains stale file paths and
fails to monitor file system rename events, causing the desynchronization and subsequent side effects.