Fix: update the "RegisterTool" method in server.go

[FuradWho]

When we were creating a new server registration tool, we used the "RegisterTool" method, but the "handler any" in it and the "createJsonSchemaFromHandler" method left us quite confused. We think the inputSchema can be passed in directly without the need for conversion.

[FuradWho]

func (s *Server) RegisterToolWithInputSchema(name string, description string, handler any, inputSchema *jsonschema.Schema) error {
	err := validateToolHandler(handler)
	if err != nil {
		return err
	}
	//inputSchema := createJsonSchemaFromHandler(handler)

	s.tools.Store(name, &tool{
		Name:            name,
		Description:     description,
		Handler:         createWrappedToolHandler(handler),
		ToolInputSchema: inputSchema,
	})

	return s.sendToolListChangedNotification()
}