chore: refactor example script using PEP 723

[fatelei]

run example script using PEP 723 fix #1733

Motivation and Context

• Current examples are verbose - each needs its own pyproject.toml, directory structure, and main.py
• This adds friction for users trying to understand or copy examples
• PEP 723 (supported by uv run) allows dependencies to be declared inline in a single script file

How Has This Been Tested?

run example script in local

Breaking Changes

no

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[maxisbey]

Closing this as it just deletes all examples