feature(workflow): added chinese docs grammer checker

[yashisrani]

What type of PR is this?

/kind enhancement
/kind documentation
/kind feature

What this PR does / why we need it:
This PR introduces a new GitHub Actions workflow to automatically check the grammar, spelling, and style of Chinese documentation in the Kmesh project. The workflow uses LanguageTool to analyze .md files in the docs/cn/zh/ directory and provides actionable feedback to contributors.

The goal is to:

• Improve the quality and professionalism of Chinese documentation
• Catch common errors (e.g., "降低3倍", "原因是因为") early in the contribution process
• Provide non-blocking, helpful suggestions to authors
• Reduce the burden of manual grammar review

Which issue(s) this PR fixes:
Fixes #1412

Special notes for your reviewer:

• The workflow runs on push and pull_request events to main branch
• It only checks files under docs/cn/zh/** to focus on Chinese content
• The workflow uses ::warning annotations instead of ::error to avoid blocking PRs
• Emojis are used for better readability and visual scanning of logs

Does this PR introduce a user-facing change?:

NONE

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

[kmesh-bot]

@yashisrani: The label(s) kind/documentation cannot be applied, because the repository doesn't have them.

Details

In response to this:

What type of PR is this?

/kind enhancement
/kind documentation
/kind feature

What this PR does / why we need it:
This PR introduces a new GitHub Actions workflow to automatically check the grammar, spelling, and style of Chinese documentation in the Kmesh project. The workflow uses LanguageTool to analyze .md files in the docs/cn/zh/ directory and provides actionable feedback to contributors.

The goal is to:

• Improve the quality and professionalism of Chinese documentation
• Catch common errors (e.g., "降低3倍", "原因是因为") early in the contribution process
• Provide non-blocking, helpful suggestions to authors
• Reduce the burden of manual grammar review

Which issue(s) this PR fixes:
Fixes #1412

Special notes for your reviewer:

• The workflow runs on push and pull_request events to main branch
• It only checks files under docs/cn/zh/** to focus on Chinese content
• The workflow uses ::warning annotations instead of ::error to avoid blocking PRs
• Emojis are used for better readability and visual scanning of logs

Does this PR introduce a user-facing change?:

NONE

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.40%. Comparing base (89a29e7) to head (2c75f30).
⚠️ Report is 36 commits behind head on main.
see 2 files with indirect coverage changes

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[hzxuzhonghu]

/lgtm

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hzxuzhonghu

The full list of commands accepted by this bot can be found here.

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Details

Needs approval from an approver in each of these files:

• OWNERS [hzxuzhonghu]

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