feat(client/sse): allow to set the timeout of `POST /messages`#340

RockChinQ wants to merge 2 commits intomodelcontextprotocol:mainmodelcontextprotocol/python-sdk:mainfrom

RockChinQ:feat/sse-messages-timeoutRockChinQ/mcp-python-sdk:feat/sse-messages-timeoutCopy head branch name to clipboard