feat(module:code-editor): add code editor component

[wzhudev]

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
[ ] 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

[codecov]

Codecov Report

Merging #3706 into master will decrease coverage by 0.94%.
The diff coverage is 11.94%.

@@            Coverage Diff            @@
##           master   #3706      +/-   ##
=========================================
- Coverage   93.25%   92.3%   -0.95%     
=========================================
  Files         500     506       +6     
  Lines       10615   10749     +134     
  Branches     1924    1941      +17     
=========================================
+ Hits         9899    9922      +23     
- Misses        301     411     +110     
- Partials      415     416       +1

Impacted Files	Coverage Δ
components/core/util/tick.ts	0% <0%> (ø)
components/code-editor/nz-code-editor.component.ts	10.81% <10.81%> (ø)
components/code-editor/nz-code-editor.module.ts	100% <100%> (ø)
components/code-editor/nz-code-editor.service.ts	2.08% <2.08%> (ø)
components/code-editor/demo/basic.ts	50% <50%> (ø)
...mponents/code-editor/nz-code-editor.definitions.ts	83.33% <83.33%> (ø)
components/rate/nz-rate.component.ts	93.1% <0%> (-4.6%)	⬇️
components/time-picker/time-holder.ts	96.49% <0%> (-0.88%)	⬇️
... and 6 more

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