Add support for Pre-Translation Batch Operations

The Crowdin API adds a **Pre-Translation Batch Operations** method: `PATCH /projects/{projectId}/pre-translations`. It accepts a JSON Patch document (RFC 6902) to update multiple pre-translations in one request (e.g. change `status` or `priority`). API client libraries should expose this endpoint so consumers can perform batch updates on pre-translations via the SDK.

**References:**
- [Pre-Translation Batch Operations](https://support.crowdin.com/developer/api/v2/#tag/Translations/operation/api.projects.pre-translations.patchBatch)