feat(module:layout): support zeroTrigger

[vthinkxie]

close #1950 close #1951

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
[x] No

Other information

[netlify]

Deploy preview for ng-zorro-master ready!

Built with commit e065ec5

https://deploy-preview-2938--ng-zorro-master.netlify.com

[codecov]

Codecov Report

Merging #2938 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2938      +/-   ##
==========================================
+ Coverage   97.36%   97.37%   +<.01%     
==========================================
  Files         524      524              
  Lines       11043    11045       +2     
  Branches      782      782              
==========================================
+ Hits        10752    10755       +3     
  Misses        190      190              
+ Partials      101      100       -1

Impacted Files	Coverage Δ
components/layout/demo/responsive.ts	100% <ø> (ø)	⬆️
components/layout/demo/side.ts	100% <ø> (ø)	⬆️
components/layout/demo/basic.ts	100% <ø> (ø)	⬆️
components/layout/demo/custom-trigger.ts	100% <ø> (ø)	⬆️
components/layout/nz-sider.component.ts	98.03% <100%> (+2.12%)	⬆️

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