*: create TOC and overview for TiDB Cloud releases

[lilin90]

What is changed, added or deleted? (Required)

• Create TOC-tidb-cloud-releases.md and tidb-cloud/releases/_index.md
• Move all TiDB Cloud release notes and maintenance notifications to tidb-cloud/releases

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions.

• master (the latest development version)
• v9.0 (TiDB 9.0 versions)
• v8.5 (TiDB 8.5 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s):

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[gemini-code-assist]

Summary of Changes

Hello @lilin90, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly refactors the documentation structure for TiDB Cloud releases and maintenance notifications. By creating a dedicated directory, a new table of contents, and an overview page, it aims to improve the discoverability and organization of release-related information for users. This change centralizes these documents, making the overall documentation more streamlined and easier to navigate.

Highlights

• New Table of Contents for Releases: A new file, TOC-tidb-cloud-releases.md, has been introduced to centralize links for all TiDB Cloud release notes and maintenance notifications, improving discoverability.
• Dedicated Releases Overview Page: An overview page, tidb-cloud/releases/_index.md, has been added to provide a high-level summary and context for TiDB Cloud releases and maintenance notifications.
• Documentation Reorganization: All existing TiDB Cloud release notes and maintenance notification documents have been relocated into a new tidb-cloud/releases subdirectory, streamlining the documentation structure.
• Removal of Redundant Section: The 'RELEASES' section, which previously contained these links, has been removed from the main TOC-tidb-cloud.md file to avoid duplication and maintain a clean structure.

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[gemini-code-assist]

Code Review

This pull request refactors the TiDB Cloud release notes by creating a dedicated table of contents and an overview page, and moving the related files into a new releases directory. The changes improve the structure and organization of the documentation.

My review includes suggestions to correct the paths in the new TOC file, improve wording for clarity and conciseness, and fix a potentially incorrect link in the new overview page.

[lilin90]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lilin90

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Details

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• OWNERS [lilin90]

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