fix(genai): improve tool config, response metadata, and structured output#10434

pawel-twardziak wants to merge 4 commits intolangchain-ai:mainlangchain-ai/langchainjs:mainfrom

pawel-twardziak:fix/genai-tool-config-response-metadata-structured-outputpawel-twardziak/langchainjs:fix/genai-tool-config-response-metadata-structured-outputCopy head branch name to clipboard