feat(input): add new input component

[Kimi-Gao]

• Make sure that you propose PR to right branch: bugfix for master, feature for latest active branch feature-x.x.
• Make sure that you follow earth-ui's code convention.
• Add some descriptions and refer relative issues(optional) for your PR.
• Add Assignees(assign yourself mostly) for your PR.
• Add Labels for your PR.

Extra checklist:

• Update API docs for the component.
• Update/Add demo to demonstrate new feature.
• Add unit tests for the feature.

Relative issue:

re #62

Description:

ScreenShots:

Gif:

[codecov]

Codecov Report

Merging #77 into master will increase coverage by 4.71%.
The diff coverage is 74.41%.

@@            Coverage Diff             @@
##           master      #77      +/-   ##
==========================================
+ Coverage   10.84%   15.55%   +4.71%     
==========================================
  Files          70       69       -1     
  Lines        1411     1414       +3     
  Branches      322      321       -1     
==========================================
+ Hits          153      220      +67     
+ Misses        964      912      -52     
+ Partials      294      282      -12

Impacted Files	Coverage Δ
src/components/Form/FormInput/index.js	0% <0%> (ø)	⬆️
src/components/Select/Select/index.js	0% <0%> (ø)	⬆️
src/components/Input/index.js	97.22% <96.96%> (+97.22%)	⬆️
src/components/Popover/CoordinateFactory.js	2.22% <0%> (+2.22%)	⬆️
src/components/Popover/PopoverContent.js	13.33% <0%> (+13.33%)	⬆️
src/components/Popover/index.js	23.17% <0%> (+23.17%)	⬆️
src/components/Tooltip/index.js	100% <0%> (+100%)	⬆️
src/components/_utils/omit.js	100% <0%> (+100%)	⬆️

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