docs: add LLM integration context and usage guidance

[eltonvs]

Summary

• improve README quickstart and command examples for implementation tasks
• add llms.txt for machine-readable project indexing
• add LLM_CONTEXT.md with API usage patterns, error handling, and decision rules for assistants
• refresh CI badge and fix README snippet/typo issues discovered during the update

Notes

• docs-only changes
• no runtime code changes

[greptile-apps]

Greptile Summary

This PR enhances the repository's documentation to improve LLM discoverability and developer onboarding. The changes add structured machine-readable context files (llms.txt and LLM_CONTEXT.md) that help AI coding assistants understand when and how to use this library, while significantly improving the README with a complete working code example, clearer installation instructions, and updated CI/maintainability badges.

Key improvements:

• Added LLM_CONTEXT.md with comprehensive API usage patterns, error handling guidance, and concurrency notes
• Added llms.txt following the emerging standard for machine-readable project indexes
• Rewrote README quickstart section with a complete, runnable Kotlin example including imports
• Updated README with separate Gradle Kotlin DSL and Groovy sections
• Fixed README typos and improved clarity throughout
• Refreshed CI badge URL and replaced CodeClimate/Codebeat with Qlty maintainability badge

All documentation accurately reflects the actual codebase behavior, as verified against source files.

Confidence Score: 5/5

• This PR is completely safe to merge with no risks
• Documentation-only changes with no runtime code modifications. All new content is accurate and consistent with the actual codebase implementation. The additions improve developer experience and LLM integration without any potential for breaking changes or runtime issues.
• No files require special attention

Important Files Changed

Filename	Overview
LLM_CONTEXT.md	New comprehensive LLM integration guide with API patterns, error handling, and usage examples - well-structured and accurate
llms.txt	New machine-readable project index for LLM discovery - concise and accurate
README.md	Enhanced quickstart with complete code example, improved installation instructions, updated badges, and minor fixes

_{Last reviewed commit: 54fd842}