Merge pull request modelcontextprotocol#783 from modelcontextprotocol…

…/davidsp/2025-06-18

The Model Context Protocol - Revision 2025-06-18

Merge pull request modelcontextprotocol#232 from modelcontextprotocol…

…/justin/release

2025-03-26 release

Merge pull request modelcontextprotocol#173 from PederHP/feat/complet…

…ion_capability_as_optional

Completions capability flag

Model Context Protocol Protocol version 2024-11-05