docs: update CNCF status from Sandbox to Incubating

[mesutoezdil]

PR #529 updated the homepage and footer to say Incubating instead of Sandbox.

This PR covers the docs that PR #529 did not touch:

• docs/contributor/contributing.md
• docs/core-concepts/introduction.md
• docs/core-concepts/gpu-virtualization.md
• concept.md
• zh versions of the three docs above

Also updates the landscape links to include the incubating filter, matching the pattern used in PR #529.

Summary by CodeRabbit

• Documentation
  • Updated HAMi’s project status across user-facing docs to reflect its CNCF Incubating status instead of Sandbox.
  • Adjusted related CNCF Landscape links and references in both current and versioned documentation.
  • Kept the rest of the product and architecture descriptions unchanged.

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR updates documentation across English and Chinese locales, and current and versioned (v2.9.0) doc trees, changing HAMi's stated CNCF project status from "Sandbox" to "Incubating," with corresponding CNCF/CNAI Landscape link updates in some files.

Changes

CNCF Status Wording Update

Layer / File(s)	Summary
Current English docs status update concept.md, docs/contributor/contributing.md, docs/core-concepts/gpu-virtualization.md, docs/core-concepts/introduction.md	Project status text changed from "CNCF Sandbox" to "CNCF Incubating"; introduction.md also updates the associated Landscape URL.
Current Chinese i18n docs status update i18n/zh/.../current/core-concepts/gpu-virtualization.md, i18n/zh/.../current/core-concepts/introduction.md	Status wording changed to "CNCF 孵化项目"; introduction.md updates CNCF/CNAI Landscape hyperlinks accordingly.
Versioned v2.9.0 docs status update versioned_docs/version-v2.9.0/contributor/contributing.md, versioned_docs/version-v2.9.0/core-concepts/gpu-virtualization.md, versioned_docs/version-v2.9.0/core-concepts/introduction.md, i18n/zh/.../version-v2.9.0/core-concepts/gpu-virtualization.md, i18n/zh/.../version-v2.9.0/core-concepts/introduction.md	Same status wording and link updates applied to the versioned v2.9.0 English and Chinese documentation set.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested labels: lgtm, approved

Suggested reviewers: archlitchi, rootsongjc, wawa0210

Poem

A rabbit hopped through docs today,
Changed "Sandbox" words along the way,
Now "Incubating" HAMi stands so tall,
Across each language, docs and all! 🐇
Hop, hop, hooray for status new!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: updating documentation from CNCF Sandbox to Incubating.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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This pull-request has been approved by: mesutoezdil

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[saiyam1814]

you beat me, this was my next pr 😁

[mesutoezdil]

you beat me, this was my next pr 😁

haha i did not know it sorry :)