MCP Server improvments

Here are a list of improvement we could do for MCP server:

1. Github CI/CD for the tests
2. Publish it nightly to PyPi, and release it when it's ready, including License and notice. Having an offline discussion with @HonahX , due to two different repos between CLI and MCP, we will need to create two different projects in PyPI repo.
3. Documentation in the Polaris site.
4. Add integration test, or benchmark
5. Better context, this is a big projects including adding more examples, rest spec, Polaris doc, etc.
6. Realm Support
7. Configure file support

Related discussion: https://github.com/apache/polaris-tools/pull/39#discussion_r2515033285

cc @adam-christian-software

Start with the related discussion on pull request #39 and review the MCP server project structure. The issue lists CI/CD, PyPI publishing, Polaris documentation, integration tests or benchmarks, examples and REST specification work, Realm support, and configuration-file support; completion requires narrowing these into separately scoped tasks.

Written by the indexing model from the issue text.