feat: Update storybook to 6.5.12

1. Add react-transition-group because primereact depend on it. We only use Calendar in primereact to develop DatetimePicker, I think we can remove primereact later, it's a too-big package. We don't need add react-transition-group before because @storybook/addon-knobs depend on it, and now we remove @storybook/addon-knobs.
2. Add webpack devDependencies because storybook need explicitly specify webpack.