Implement SEP-1730: Conformance testing #195
Description
The context:
- SEP-1730: SDKs Tiering System
- SEP 1730: SDK tiers definition
- https://github.com/modelcontextprotocol/conformance
- https://github.com/modelcontextprotocol/conformance/blob/main/SDK_INTEGRATION.md
- Discord message
Outcome:
- The conformance test suite has been added to the SDK repository.
- The suite is available for local runs and CI
- The suite will be used as an alignment reference for future updates; passing all tests is not the goal here