docs: Provide CN translation for four docs

[Shen7436]

This PR:

• Adjusts some format issues and unclear expressions for configuretoolchain.rst, cmakeeditor.rst, switchlanguage.rst, partitiontableeditor.rst in the docs/en/additionalfeatures folder based on Espressif Style Guide.
• Provides CN translation for above four docs.
• TODO: Closes DOC-12875 once merged

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch docs/translate_four_additionalfeatuers_docs

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[Shen7436]

Hi @0cici @leeebo PTAL, thx!

[kolipakakondal]

Thanks for the PR @Shen7436 LGTM

[0cici]

Hi @Shen7436 , the translation LGTM! I left minor suggestions. PTAL. Thx!

[leeebo]

@Shen7436 LGTM！