Add AI triage agent workflow and LLM documentation from vscode-gradle

[Copilot]

This PR adds AI-powered issue triage capabilities to the vscode-java-dependency repository by integrating the triage agent workflow and LLM documentation from the vscode-gradle repository.

Changes Made

Added Files

1. .github/workflows/triage-agent.yml - AI-powered workflow that automatically triages new issues by:

   • Triggering on new issue creation or manual workflow dispatch
   • Extracting issue metadata (title, body, labels, user)
   • Calling an Azure Function for AI-powered analysis
   • Automatically applying appropriate labels and comments

2. .github/llms.md - Documentation that provides:

   • Overview of Extension Pack for Java components
   • Labeling guidelines for AI triage
   • Issue type categorization rules
   • Context for LLM understanding of Java extension ecosystem

Key Updates

• Updated the repoId in the workflow payload from "microsoft/vscode-gradle" to "microsoft/vscode-java-dependency" to ensure proper repository identification
• Maintained all original functionality while adapting it for this repository's context

Benefits

• Automated Issue Triage: Reduces manual effort in categorizing and labeling new issues
• Consistent Labeling: Ensures standardized issue classification across the repository
• Improved Response Time: Faster initial response to new issues through automated analysis
• Better Issue Management: Enhanced organization and tracking of issues through systematic labeling

Technical Details

The workflow uses GitHub Actions with the following key components:

• Trigger: Activates on new issues or manual dispatch with issue number
• Data Extraction: Captures issue metadata using GitHub Script API
• AI Processing: Sends structured payload to Azure Function for analysis
• Error Handling: Comprehensive timeout and error handling for reliable operation

This implementation brings the same AI-powered triage capabilities that have been successfully used in the vscode-gradle repository to help manage and organize issues more effectively.

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