feat(module:tree-select): add status

[JackYumg]

add 'nzStatus' , display diffrent status of tree-select

• docs update 'nzStatus' docs

• test add 'nzStatus' tests

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
• [ x] Tests for the changes have been added (for bug fixes / features)
• [x ] 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
[x] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: 7389

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[codecov]

Codecov Report

Merging #7477 (c14ea78) into master (202b4da) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #7477      +/-   ##
==========================================
+ Coverage   91.57%   91.58%   +0.01%     
==========================================
  Files         496      496              
  Lines       16316    16328      +12     
  Branches     2531     2533       +2     
==========================================
+ Hits        14941    14954      +13     
+ Misses       1050     1049       -1     
  Partials      325      325              

Impacted Files	Coverage Δ
components/tree-select/tree-select.component.ts	91.35% <100.00%> (+0.44%)	⬆️
components/core/util/text-measure.ts	92.98% <0.00%> (+0.87%)	⬆️

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