Add environment variable documentation to VS Code extension README

[rysweet]

Summary

Add comprehensive documentation for environment variables used by the VS Code Blarify extension to help users understand configuration options and troubleshooting.

Context

Following the implementation of environment variable-based configuration in PR #55, we should document the environment variables that users might need to know about for advanced configuration and troubleshooting.

Proposed Enhancement

Add a new section to vscode-blarify-visualizer/README.md documenting:

Environment Variables Section

Blarify Configuration Variables:

• ROOT_PATH: Workspace path to analyze (set automatically)
• NEO4J_URI: Neo4j database connection URI (default: bolt://localhost:7957)
• NEO4J_USER: Neo4j username (default: neo4j)
• NEO4J_PASSWORD: Neo4j password (managed automatically)
• ENABLE_LLM_DESCRIPTIONS: Enable AI-powered descriptions (true/false)
• ENABLE_DOCUMENTATION_NODES: Include documentation nodes (default: true)
• NAMES_TO_SKIP: Comma-separated list of patterns to exclude
• PYTHONPATH: Python module path (set automatically)

Azure OpenAI Variables (when configured):

• AZURE_API_KEY: Azure OpenAI API key
• AZURE_ENDPOINT: Azure OpenAI endpoint URL
• AZURE_DEPLOYMENT: Azure OpenAI deployment name

Troubleshooting Notes:

• These variables are set automatically by the extension
• Manual override possible for advanced users
• Useful for debugging connection issues

Priority

Low - Enhancement for future release

Related

• PR Fix BlarifyIntegration command mismatch - replace 'ingest' with environment variables #55: Fix BlarifyIntegration command mismatch with environment variables
• Code review feedback suggesting documentation improvement