add: elicitation support

[QuantGeekDev]

Added support for elicitation introduced in the 2025-06-18 specification update. Works across Tools, Resources and Prompts.

This PR depends on #532 for using elicitation from the sdk

Motivation and Context

Adds the ability for users to debug and test the new elicitation feature

How Has This Been Tested?

Here is a video showcasing the functionality and testing

Tested against a demo server I built to test elicitations mcp-elicitations server that implements elicitation in tools, prompts, and resources with the @modelcontextprotocol/[email protected]
The server is also accessible via this url https://weekly-mink.mcpstudio.io/mcp
You can replicate results by checking out this branch, and connecting the inspector to the hosted server url via streamable-http. Then try to use any of the prompts, tools, or resources. I recommend increasing the request timeout in the inspector configuration

I would appreciate feedback on this - are modals a good way to represent elicitation in the inspector?

Breaking Changes

No, this is a new feature of the protocol that has to be specifically invoked in server code

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