docs: Provide CN translation for three additionalfeatures docs

[Shen7436]

This PR:

• Adjusts some format issues and unclear expressions for nvspartitioneditor.rst, application-size-analysis.rst and gdbstubdebugging.rst in the docs/en/additionalfeatures folder based on Espressif Style Guide.
• Provides CN translation for above three docs.
• TODO: Closes DOC-12882, DOC-12881 once merged.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

✨ 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_3_additionalfeatures_docs

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[Shen7436]

Hi @0cici @leeebo PTAL, thx!

[0cici]

Hi @Shen7436, pls check my comments. Others LGTM. Thank you for the translation!

[leeebo]

@Shen7436 LGTM!