feat: optimize Keys configurable

[cipchk]

• close 全局储存key前缀 ng-alain#1955

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
[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

[codecov]

Codecov Report

Merging #1210 (4ad7e07) into master (2fb3ac6) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1210      +/-   ##
==========================================
- Coverage   96.36%   96.36%   -0.01%     
==========================================
  Files         275      275              
  Lines        8337     8335       -2     
  Branches     1518     1518              
==========================================
- Hits         8034     8032       -2     
  Misses        137      137              
  Partials      166      166              

Impacted Files	Coverage Δ
packages/form/src/validator.factory.ts	95.45% <ø> (ø)
packages/theme/src/theme.module.ts	100.00% <ø> (ø)
...es/theme/src/services/settings/settings.service.ts	91.66% <100.00%> (-0.34%)	⬇️

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[ng-alain-bot]

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