- Add `userInfoURL` constant for fetching user information.
- Implement `ensureRootFolderID` function to retrieve and set the driver's root folder ID if not already present.
- Integrate `ensureRootFolderID` into the driver's `Init` process.
- Define `UserInfoData` struct to parse the `rootDirId` from user information responses.
- Implement multi-part chunked upload logic for the BitQiu service.
- Introduce `UploadInitData` and `ChunkUploadResponse` structs for structured API communication.
- Refactor the `Save` method to orchestrate initial upload, chunked data transfer, and finalization.
- Add `uploadFileInChunks` function to handle sequential uploading of file parts.
- Add `completeChunkUpload` function to finalize the chunked upload process on the server.
- Ensure proper temporary file cleanup using `defer tmpFile.Close()`.
- Implement `Rename` operation with retry logic and API calls.
- Implement `Copy` operation, including asynchronous handling, polling for completion, and status checks.
- Implement `Remove` operation with retry logic and API calls.
- Add new API endpoint URLs for rename, copy, and delete, and a new copy success code.
- Introduce `AsyncManagerData`, `AsyncTask`, and `AsyncTaskInfo` types to support async copy status monitoring.
- Add utility functions `updateObjectName` and `parentPathOf` for object manipulation.
- Integrate login retry mechanism for all file operations.
- Implement `GetLink` method to retrieve download links for files.
- Implement `CreateDir` method to create new directories.
- Implement `Move` method to relocate files and directories.
- Add new API endpoints and data structures for download and directory creation responses.
- Integrate retry logic with re-authentication for API calls in implemented methods.
- Update HTTP request headers to include `x-requested-with`.
