This commit adds a new boolean parameter to convert .gmi links to .html in the output:
- Adds a new parseGeminiLink parameter to replace .gmi with .html in links
- Updates the CLI tool to expose --replace-gmi-ext flag
- Adds tests for the new functionality
- Updates documentation
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
