tidb-cloud: create premium directory and index

[lilin90]

What is changed, added or deleted? (Required)

Create premium/_index.md in tidb-cloud

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 introduces a new, dedicated documentation entry point for TiDB Cloud's premium offerings. It centralizes access to a wide array of guides, tutorials, and reference materials specifically tailored for premium users. The page is structured to provide clear learning paths across various aspects of TiDB Cloud, from initial learning and development to advanced maintenance, security, and integrations, ensuring a streamlined experience for those on the premium plan.

Highlights

• New Documentation Entry Point: A new directory and an _index.md file have been created under tidb-cloud/premium/ to serve as a dedicated landing page for TiDB Cloud Premium documentation.
• Structured Learning Paths: The new page organizes various documentation topics into distinct 'Learning Paths' such as Learn, Try, Develop, Maintain, Migrate, Monitor, Tune, Security, Billing, Integrations, and Reference, providing a comprehensive overview for premium users.
• Premium Plan Specific Links: All links within this new index page are specifically tagged with ?plan=premium, ensuring that users are directed to content relevant to the premium tier of TiDB Cloud.

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[gemini-code-assist]

Code Review

This pull request introduces a new landing page for the 'premium' section of the TiDB Cloud documentation. The changes are well-structured and provide a clear overview of different learning paths. I've suggested a few minor improvements for conciseness and consistency, in line with the repository's style guide.

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-10-15 07:06:12.696275611 +0000 UTC m=+250678.773528161: ☑️ agreed by qiancai.

[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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