[wip] auth debugger

[pcarleton]

Motivation and Context

Adds a step-by-step auth debugger, going through the different client steps for a server.

TODO:

• [ ] Add tests
• [ ] Make the "tab" view after regular connection work correctly (currently shows "Unauthenticated" when it shouldn't)
• [ ] Get rid of misleading Toast when opening flow in a new tab

How Has This Been Tested?

Breaking Changes

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] 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