[Docs] Missing `tool_input` and `tool_response` Schemes for Hook Development

In claude-code official doc, the reference says PreToolUse Hook and PostToolUse Hook can handle various tool-using events. And input scheme for different tool-using is different. However, I failed to find any reference to these kinds of tool input/response schemes.

As the key document for building with claude-code, it should be improved as soon as possible. Thank you for your efforts.