feat: 新增生僻字键盘

[Andyliwr]

生僻字问题一直是社会难点之一，各行业由于不同时期不同标准开发使得支持的汉字字符不同，导致生僻字姓名互联互通困难，严重影响生僻字人办理互联网业务；
此生僻字键盘可以帮助生僻字用户解决姓名无法在计算机世界中输入的问题。

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.36 ⚠️

Comparison is base (3a7c223) 11.41% compared to head (e702ab6) 11.05%.

❗ Current head e702ab6 differs from pull request most recent head 2c10a51. Consider uploading reports for the commit 2c10a51 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #603      +/-   ##
==========================================
- Coverage   11.41%   11.05%   -0.36%     
==========================================
  Files         152      160       +8     
  Lines        3135     3246     +111     
  Branches      801      848      +47     
==========================================
+ Hits          358      359       +1     
- Misses       2428     2506      +78     
- Partials      349      381      +32     

Impacted Files	Coverage Δ
src/RareWordsKeyboard/constants.ts	0.00% <0.00%> (ø)
src/RareWordsKeyboard/index.ts	0.00% <0.00%> (ø)
src/RareWordsKeyboard/props.js	0.00% <0.00%> (ø)
src/RareWordsKeyboard/utils.ts	0.00% <0.00%> (ø)
src/RareWordsKeyboard/zdatas.ts	0.00% <0.00%> (ø)
src/Form/form.ts	0.00% <0.00%> (ø)
src/Rate/index.ts	0.00% <0.00%> (ø)
src/Slider/index.ts	0.00% <0.00%> (ø)
src/Collapse/index.ts	0.00% <0.00%> (ø)
src/IndexBar/index.ts	0.00% <0.00%> (ø)
... and 153 more

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