tfeat: add /docs/llms.txt for llms to get all the docs at once

[Xe]

Adds llms.txt support for Tigris, allowing AI agents to better understand the documentation.

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
docs-redirect	Ready	Preview	Comment	Sep 19, 2025 4:19pm
tigris-os-docs	Ready	Preview	Comment	Sep 19, 2025 4:19pm

[greptile-apps]

Greptile Summary

This PR implements support for the llms.txt standard by integrating the docusaurus-plugin-generate-llms-txt plugin into the Tigris documentation site. The plugin automatically generates a single consolidated markdown file at /llms.txt containing all documentation content in an AI-friendly format.

The implementation involves three key changes:

1. Package dependency: Adds the docusaurus-plugin-generate-llms-txt plugin (version ^0.0.1) to package.json
2. Plugin configuration: Integrates the plugin into the Docusaurus configuration with minimal setup, specifying only the output filename
3. Version control: Properly excludes the generated static/llms.txt file from Git tracking since it should be regenerated during each build

This change fits well within the existing Docusaurus-based documentation architecture. The plugin follows standard Docusaurus extension patterns and generates the file during the build process, making it available at /docs/llms.txt for AI agents and language models to consume. The llms.txt format provides a standardized way for AI systems to access comprehensive documentation content in a single, parseable file, which enhances the discoverability and usability of Tigris documentation for AI-powered tools and assistants.

Confidence score: 3/5

• This PR introduces a dependency on a very early-stage plugin (version 0.0.1) which may have stability or compatibility issues
• Score reflects concerns about using an untested plugin version in production, though the functionality itself is straightforward
• Pay close attention to package.json and docusaurus.config.js for potential plugin compatibility issues

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[greptile-apps]

style: The comment stating 'defaults to llms.txt if not specified' makes this configuration redundant - could be removed for cleaner config.