feat: add type, disabled, subTitle prop to support navigation step

[yutingzhao1991]

for ant-design/ant-design#17814

[vercel]

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[coveralls]

Coverage increased (+1.9%) to 74.021% when pulling c964e90 on feat/nav into 75f45fb on master.

[yutingzhao1991]

修改了 dom 结构之后通过 css 样式可以实现如下的效果：

这个改动会影响 antd 那边的样式，到时候需要 antd 也同步做下调整。

[zombieJ]

看起来没问题：https://rc-steps-git-feat-nav.react-component.now.sh/examples/nav-base.html

@afc163

[afc163]

点击响应的区域有问题，点击上面区域，跳到了 1。

建议只有蓝线区域才有手型和对应的点击操作。

[yutingzhao1991]

@afc163 处理了，把点击区域修改为 -item-container 这个范围内。

[yutingzhao1991]

@zombieJ 新增了一个 disabled。

[yutingzhao1991]