refactor(theme:menu): refactor MenuService

[cipchk]

• Breaking Changes: collapsed instead of open
• close 能否对Menu的Item增加collapsed属性支持 ng-alain#2228
• close (theme:menu): can't click menu item when it has hidden children  ng-alain#2282

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ng-alain/delon/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)
[x] 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?

[x] Yes
[ ] No

Other information

[ng-alain-bot]

Preview is ready!

[codecov]

Codecov Report

Merging #1507 (2e378c6) into master (adffdc8) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1507      +/-   ##
==========================================
+ Coverage   95.62%   95.64%   +0.01%     
==========================================
  Files         271      271              
  Lines        8419     8457      +38     
  Branches     1634     1648      +14     
==========================================
+ Hits         8051     8089      +38     
  Misses        307      307              
  Partials       61       61              

Impacted Files	Coverage Δ
...kages/theme/layout-default/layout-nav.component.ts	96.96% <100.00%> (-0.16%)	⬇️
packages/theme/src/services/menu/menu.service.ts	100.00% <100.00%> (ø)

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