add streamable http support

[robertlestak]

No description provided.

[Laksh-star]

Thanks so much for the contribution and the detailed implementation! Before I review and merge, could you please:

• Add a brief PR description and quick testing steps (e.g., how to run: npm run start:http and how to test /mcp).
• Add tests covering tool handlers and the streamable HTTP session lifecycle (unit tests with mocked TMDB, or a small integration test).
• Run npm audit and either fix or document any high/critical findings. Please confirm if package-lock.json was added intentionally.
• Ensure CI runs a build (npm ci && npm run build) and tests — add a workflow if one's missing.

Once you've pushed those, I'll re-run CI and continue the review. If you have any questions or context to share (e.g., example requests), please include those too. Thanks again!