generateHandler needs to call the client and extract parameters from the mcp requests

[erikist]

For example, with the current SetVibe proto -- we should call through to the client:

func (s *vibeServiceMCPServer) SetVibeHandler(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
	// TODO: Implement the handler for SetVibe
	// Example: Extract the vibe from the request and call the underlying service
	vibe, ok := req.Params.Arguments["vibe"].(string)
	if !ok {
		return nil, errors.New("vibe not a string")
	}

	// Call the driver client to get drivers
	res, err := s.SetVibe(ctx, &SetVibeRequest{
		Vibe: vibe,
	})

	if err != nil {
		return nil, err
	}

	//TODO: think about this response
	return mcp.NewToolResultText(res.Vibe), nil
}

I have some open questions in general around what those tool results should be returning and we need to explore that.