[docs]fix: add missing Chinese translations and fix image reference p…

[KeXingJian]

…aths

• Add Chinese translations for 4 English-only help docs:
  • collector.md
  • mysql_account_expiry.md
  • registry.md
  • template_marketplace.md
• Register new docs in sidebars.json
• Fix image reference paths across multiple .md files

What's changed?

Document files in the home directory

Checklist

• [ ✅] I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

Add or update API

• I have added the necessary e2e tests and all cases have passed.

[zqr10159]

Thanks for the update. I’d like to better understand the need for the image reference changes. As I understand it, the framework renders relative paths, and the images do appear correctly on the actual blog pages.

Could you clarify why these path changes are necessary? Are there any pages where the images are currently broken or rendered incorrectly?

If possible, could you also provide before-and-after screenshots for comparison? That would make it easier to evaluate whether this part of the change is needed.

[KeXingJian]

Okay, so the image reference path is correct. It's like this: during the supplementary document review—directly opening the .md file—I saw the image below.

But considering these .md files are used for blog display, then it's not wrong. Should I turn off this PR and submit a clean PR for you? Thank you for your detailed review.