Docs/translate marketplaceupdate.rst and buildproject.rst

[Shen7436]

This PR:

• Adjusts some format issues and unclear expressions for marketplaceupdate.rst and buildproject.rst in the docs/en folder based on Espressif Style Guide.
• Provides CN translation for above two docs.
• TODO: Closes DOC-12873 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_update_guide_and_buildproject

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[Shen7436]

Hi @April-Yjj @leeebo PTAL, thx!

[April-Yjj]

Hi @Shen7436 Please check my review comments. Thanks for the translation!

[kolipakakondal]

LGTM

[leeebo]

@Shen7436 LGTM!