Add citation analysis commands to CLI

[turbomam]

Problem

Citation analysis functionality exists as MCP tools but is not available via the CLI. Users who want to use citation analysis without MCP cannot access these features.

Missing CLI Commands

The following functions exist in tools.py but have no corresponding CLI commands:

• get-paper-references - Get papers cited BY a given paper
• get-paper-citations - Get papers that CITE a given paper
• get-citation-network - Get comprehensive citation data
• find-related-papers - Discover related papers via citation networks

Current State

• ✅ Functions implemented in src/artl_mcp/tools.py
• ❌ Not registered in src/artl_mcp/cli.py
• ❌ Not available via artl-cli command

Proposed Solution

1. Add Click command wrappers in cli.py for each function
2. Follow existing patterns for other CLI commands
3. Include proper help text and parameter documentation
4. Add tests for CLI commands
5. Update documentation in README.md and USERS.md

Dependencies

• Issue Enable citation analysis tools in MCP server #210 - These tools need to be enabled in MCP first
• Tools should be tested and working before adding CLI access

References

• src/artl_mcp/cli.py - Add commands here
• src/artl_mcp/tools.py:1578-1800 - Implementations