refactor(mark): inline shape and infer transform

[pearmini]

Refactor Mark

为了未来满足如下的写法：

import { Runtime, Interval, createCorelib, extend } from '@antv/g2';

const Chart = extend(Runtime, { ...createCorelib(), 'mark.interval': Interval });

const chart = new Chart();

chart.interval().data(data).encode('x', 'name').encode('y', 'value');

chart.render();

• 将 mark 的 shape 和 infer transform（Maybe 开头的 transform） 对应的组件直接放入了 mark。
• stdlib 去掉了 shape（label shape 还是保存着） 和 infer transform。

[coveralls]

Pull Request Test Coverage Report for Build 5819464364

• 127 of 127 (100.0%) changed or added relevant lines in 27 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 89.409%

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Totals
Change from base Build 5806672521:	0.03%
Covered Lines:	9603
Relevant Lines:	10401

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💛 - Coveralls