new nav release-5.4: remove releases and and best practices from TOC.md

[qiancai]

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What is changed, added or deleted? (Required)

• Removed doc entries for Best Practices/Release Notes
• Moved TiDB Installation Packages from the Release Notes category to the References category
• Moved java-app-best-practices.md -> develop/

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[gemini-code-assist]

Summary of Changes

Hello @qiancai, 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This pull request refines the documentation structure for TiDB 5.4 by removing outdated or less relevant sections from the primary navigation. It also includes a reclassification of certain documentation files and updates internal links to ensure all references point to the correct and most current information, thereby enhancing the overall clarity and maintainability of the documentation.

Highlights

• Table of Contents Streamlining: The main Table of Contents (TOC.md) has been updated to remove the 'Best Practices' and 'Release Notes' sections, simplifying the documentation navigation structure.
• Documentation File Reorganization: The file 'java-app-best-practices.md' has been moved from the 'best-practices/' directory to the 'develop/' directory, indicating a reclassification of its content.
• Internal Link Updates: Several internal links across various documentation files, including 'br/backup-and-restore-use-cases.md', 'telemetry.md', and 'upgrade-tidb-using-tiup.md', have been updated to point to a new, centralized external URL for release notes.

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Changelog

• TOC.md
  • Removed the 'Best Practices' section and all its associated sub-entries.
  • Removed the extensive 'Release Notes' section, which included entries for numerous historical versions.
• best-practices/java-app-best-practices.md -> develop/java-app-best-practices.md
  • The file 'java-app-best-practices.md' was moved from the 'best-practices/' directory to the 'develop/' directory.
• br/backup-and-restore-use-cases.md
  • Updated the link for 'TiDB/TiKV/PD/BR' from an internal path '/releases/release-notes.md' to an external URL 'https://docs.pingcap.com/releases/tidb-self-managed/'.
• telemetry.md
  • Updated the link for 'release notes' from an internal path '/releases/release-notes.md' to an external URL 'https://docs.pingcap.com/releases/tidb-self-managed/'.
• upgrade-tidb-using-tiup.md
  • Updated the link for 'Release Notes' from an internal path '/releases/release-notes.md' to an external URL 'https://docs.pingcap.com/releases/tidb-self-managed/'.

Activity

• No human activity has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request updates the navigation for the release-5.4 documentation by removing the 'Best Practices', 'Develop Guide', and 'Release Notes' sections from the table of contents. It also updates several internal links that were pointing to the now-removed release notes. The changes are straightforward and achieve the stated goal. I've added one minor suggestion to improve readability in one of the updated files.