docs: auto detect version

[danielclow]

use new placeholder to insert latest version

[gemini-code-assist]

Summary of Changes

Hello @danielclow, 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 improves the maintainability and accuracy of the TDengine documentation. By introducing an automated version placeholder, it streamlines the process of updating version numbers across various installation and deployment guides. Additionally, it refines product naming conventions for better consistency, modularizes content for enhanced readability and reusability, and updates Docker image references to reflect current best practices.

Highlights

• Automated Versioning: Implemented a {{VERSION}} placeholder across documentation files to automatically insert the latest product version, simplifying future updates and ensuring consistency.
• Product Naming Consistency: Standardized product references from 'TDengine' to 'TDengine TSDB' and updated Docker image names (e.g., tdengine/tdengine to tdengine/tsdb-ee) for clarity and consistency throughout the documentation.
• Documentation Structure Refinement: Modularized content in 'Get Started' guides by replacing verbose sections with reusable components (e.g., <Getstarted/>) and dynamic card lists for improved readability and navigation.
• TDgpt Documentation Updates: Applied versioning placeholders and updated Docker run commands to use the latest tag for TDgpt images, along with minor textual corrections for accuracy.

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[gemini-code-assist]

Code Review

This pull request updates the documentation to use a {{VERSION}} placeholder instead of hardcoded version numbers, which is a great improvement for maintainability. The changes also standardize product names like 'TDengine TSDB' and update Docker image references. The refactoring to use shared content with <Getstarted/> is also a good change. I've added a couple of suggestions in docs/en/06-advanced/06-tdgpt/02-tutorial.md to improve clarity for users running specific Docker image versions.