Missing sections in Spanish documentation
**Expected output**: Nested sections with proper documents in Spanish translation.
**Current output**: Some sections are missing (but docs are present), so documents are not correctly organized

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After contributing to #15947, I noticed `_toctree.yml` for the Spanish translation is not following the proper order as the original documentation.

For example, there is no `General Usage` section in the Spanish version, but the `Create a custom architecture` ([create_a_model](https://huggingface.co/docs/transformers/v4.24.0/es/create_a_model)) document Is present. 

Contributions to #15947 missed adding the right sections updating `_toctree.yml`.
Hi @sgugger. Maybe you can help me to verify this issue I just opened. I attached a PR to fix it (you might also be the right person to review and approve it). Thanks!