docs: update todo tutorial

[xiaoyijun]

1. polish existing todo tutorial
2. add python todo tutorial

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[Copilot]

Pull Request Overview

This PR updates the todo tutorial documentation to polish the existing content and add Python implementation alongside the existing Node.js version. The updates modernize the tutorial to align with the latest MCP specification where the MCP server acts as an OAuth 2.0 Resource Server.

Key changes:

• Updated the tutorial architecture to follow OAuth 2.0 Resource Server pattern
• Added comprehensive Python implementation using FastMCP and MCPAuth
• Removed outdated authentication configuration files and consolidated setup instructions

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docusaurus.config.ts	Updated version label from "Next" to "0.2.0-beta.1"
docs/tutorials/todo-manager/_transpile-metadata.mdx	Removed outdated metadata transpilation documentation
docs/tutorials/todo-manager/_setup-oidc.mdx	Removed OIDC-specific setup instructions
docs/tutorials/todo-manager/_setup-oauth-or-oidc.mdx	Removed OAuth/OIDC setup configuration file
docs/tutorials/todo-manager/_manual-metadata-fetching.mdx	Removed manual metadata fetching instructions
docs/tutorials/todo-manager/README.mdx	Major update adding Python implementation and modernizing OAuth 2.0 Resource Server architecture