refactor: remove StdioServerParameters class

[QuantGeekDev]

client/stdio and client/sse use two different patterns for initialization, this PR tries to standardize it after discussions with @Kludex by removing StdioServerParameters

Motivation and Context

Continuation to the discussion here: #300

How Has This Been Tested?

Testing with Claude Desktop's config

Breaking Changes

This is a breaking change to how Stdio is initialized, it is no longer done via StdioServerParameters

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

[Kludex]

I don't think we want to add breaking changes, so we'd support both, and add a deprecation warning when using settings parameter.

[QuantGeekDev]

I don't think we want to add breaking changes, so we'd support both, and add a deprecation warning when using settings parameter.

Got it, that makes sense. I'll add implementation and test cases for this

[QuantGeekDev]

@Kludex Do you think it makes sense to add this, or are we going to see an overhaul here with the changes from the new spec? I can get this in over the weekend