Feature Make package installable via pip (not just a script)

[mpearmain]

Currently this MCP server requires manual setup with uv run server.py, making it difficult to integrate into projects.

Other MCP servers (Reddit, Wikipedia) are pip-installable packages which makes it super simple to use.

Minimal changes needed:
1. Add pyproject.toml with proper package metadata and dependencies
2. Add console script in pyproject.toml so users can run financial-datasets-mcp after pip install
3. Rename package from generic “mcp-server” to something like “financial-dataset --> this is obviously a change but seeing a random MCP-Server always requires me to comment that's it's this server

This would make it consistent with other MCP servers and easier to integrate into existing Python projects.

[mpearmain]

Would you like me to make a PR for this?