Rename MCPEXP002 Subclassing_* constants to Extensibility_*#1739

jeffhandley merged 2 commits into

modelcontextprotocol:mainmodelcontextprotocol/csharp-sdk:mainfrom

arimu1:rename-mcpexp002-extensibility-constantsarimu1/csharp-sdk:rename-mcpexp002-extensibility-constantsCopy head branch name to clipboard