[WIP] docs(i18n): add Chinese translation of "Tutorials" section

[tc-huang]

Type / Scope

• Type: Docs
• Scope: docs/source/zh

Summary / Motivation

• Add Chinese translation of "Tutorials" section to the directory docs/source/zh/ as mentioned in issue 🌐 [i18n-zh] Translating docs to Chinese #3290.

Related issues

• Related: 🌐 [i18n-zh] Translating docs to Chinese #3290, 🌐 [i18n-KO] Translating docs to Korean #3058

What changed

• Translate docs/source/il_robots.mdx to docs/source/zh/il_robots.mdx
• Translate docs/source/bring_your_own_policies.mdx to docs/source/zh/bring_your_own_policies.mdx
• Translate docs/source/integrate_hardware.mdx to docs/source/zh/integrate_hardware.mdx
• Translate docs/source/hilserl.mdx to docs/source/zh/hilserl.mdx
• Translate docs/source/hilserl_sim.mdx to docs/source/zh/hilserl_sim.mdx
• Translate docs/source/multi_gpu_training.mdx to docs/source/zh/multi_gpu_training.mdx
• Translate docs/source/hil_data_collection.mdx to docs/source/zh/hil_data_collection.mdx
• Translate docs/source/peft_training.mdx to docs/source/zh/peft_training.mdx
• Translate docs/source/rename_map.mdx to docs/source/zh/rename_map.mdx
• Create docs/source/zh/_toctree.yml for "Tutorials" section

How was this tested (or how to run locally)

1. Follow the instructions in docs/README.md to build and preview the documentation:

   rm -rf ~/tmp/test-build
   doc-builder build lerobot docs/source/zh --build_dir ~/tmp/test-build
   doc-builder preview lerobot docs/source/zh

2. Open the following links in a browser to verify the translated documentation:
   • TODO

Checklist (required before merge)

• Linting/formatting run (pre-commit run -a)
• Documentation updated
• CI is green