Add directoryIds and branchIds to Apply Pre-Translation

The **Apply Pre-Translation** method (`POST /projects/{projectId}/pre-translations`, `api.projects.pre-translations.post`) now supports pre-translating whole directories and branches in file-based projects, in both Crowdin and Crowdin Enterprise:

- New optional request fields `directoryIds` (array of integers) and `branchIds` (array of integers) — all nested files are included.
- `fileIds` is no longer required — it must be provided only when neither `directoryIds` nor `branchIds` is set.
- The pre-translation status/response attributes now also include `directoryIds` and `branchIds`.

Additionally, the path parameter of **Get Pre-Translation Status**, **Edit Pre-Translation**, and **Get Pre-Translation Report** was renamed from `preTranslationId` to `jobIdentifier` (`/projects/{projectId}/pre-translations/{jobIdentifier}`). This is not a wire change, but generated clients and method signatures may reflect the new name.

Client libraries should make `fileIds` optional and expose the new `directoryIds`/`branchIds` request and response fields.

**References:**
- [Apply Pre-Translation](https://support.crowdin.com/developer/api/v2/#operation/api.projects.pre-translations.post)
- [Get Pre-Translation Status](https://support.crowdin.com/developer/api/v2/#operation/api.projects.pre-translations.get)
- Crowdin Enterprise: [Apply Pre-Translation](https://support.crowdin.com/developer/enterprise/api/v2/#operation/api.projects.pre-translations.post)

Start at the api.projects.pre-translations.post entry point and inspect the generated methods for Get Pre-Translation Status, Edit Pre-Translation, and Get Pre-Translation Report. Compare their request, response, and path-parameter definitions with the linked Crowdin API references. Done means fileIds is optional, directoryIds and branchIds are exposed, and the affected parameter is named jobIdentifier.

Written by the indexing model from the issue text.