support oauth2 server support

[jokemanfire]

Motivation and Context

Add Oauth advanced encapsulation to support better development of servers that require authorization.

How Has This Been Tested?

Breaking Changes

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

[4t145]

I'm refactoring http server part now, to make it independent from axum. #228

[jokemanfire]

I'm refactoring http server part now, to make it independent from axum.

This draft is not urgent, feel free.