feat(module:color-picker): add color-picker component

[OriginRing]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #8013 (258af45) into master (078aaf9) will increase coverage by 0.03%.
Report is 1 commits behind head on master.
The diff coverage is 91.91%.

❗ Current head 258af45 differs from pull request most recent head 7bd7fa5. Consider uploading reports for the commit 7bd7fa5 to get more accurate results

@@            Coverage Diff             @@
##           master    #8013      +/-   ##
==========================================
+ Coverage   91.65%   91.68%   +0.03%     
==========================================
  Files         515      519       +4     
  Lines       17641    17776     +135     
  Branches     2790     2808      +18     
==========================================
+ Hits        16168    16298     +130     
- Misses       1175     1177       +2     
- Partials      298      301       +3     

Files Changed	Coverage Δ
components/tree/tree-node.component.ts	92.43% <ø> (+0.49%)	⬆️
components/color-picker/color-format.component.ts	89.79% <89.79%> (ø)
components/color-picker/color-picker.component.ts	92.59% <92.59%> (ø)
components/color-picker/color-block.component.ts	100.00% <100.00%> (ø)
components/color-picker/color-picker.module.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

[OriginRing]

其中依赖的ng-antd-color-picker 是 rc-component/color-picker angular版的实现

[Laffery]

• demo 的描述文案需要更新下（「最简单的用法」）
  

• 以下 demo 的样式需要调整下

[simplejason]

• demo 的描述文案需要更新下（「最简单的用法」）
  
• 以下 demo 的样式需要调整下

单独fix，可以先合并