* feat(bitqiu): Add Bitqiu cloud drive support
- Implement the new Bitqiu cloud drive.
- Add core driver logic, metadata handling, and utility functions.
- Register the Bitqiu driver for use.
* feat(driver): Implement GetLink, CreateDir, and Move 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`.
* feat(bitqiu): Add rename, copy, and delete operations
- 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.
* feat(bitqiu-upload): Implement chunked file upload support
- 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()`.
* feat(driver): Implement automatic root folder ID retrieval
- 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.
* feat(client): Implement configurable user agent
* Introduce a configurable `UserAgent` field in the client's settings.
* Add a `userAgent()` method to retrieve the user agent, prioritizing the custom setting or using a predefined default.
* Apply the determined user agent to all outbound HTTP requests made by the `BitQiu` client.
