Support for 2025-06-18 schema

[Vaiz]

A new schema has just become available. I've created this issue to track any plans or progress related to adding support for it.

https://github.com/modelcontextprotocol/modelcontextprotocol/releases/tag/2025-06-18

[hashemix]

Hey @Vaiz , thanks for creating this issue.

Support for version 2025-06-18 of the schema has been added and now available in 0.7.0

Support will be added to rust-mcp-sdk in the near future.