Rename (Async)HttpRequestCustomizer to Mcp(Async)HttpRequestCustomizer, add delegating implementation#453

Kehrlann wants to merge 3 commits intomodelcontextprotocol:mainmodelcontextprotocol/java-sdk:mainfrom

Kehrlann:dgarnier/http-request-customizer-polishKehrlann/java-sdk:dgarnier/http-request-customizer-polishCopy head branch name to clipboard