chore(theme): add icon

[cipchk]

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)
[ ] 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

[ng-alain-bot]

Preview is ready!

[codecov]

Codecov Report

Merging #1706 (7a104c1) into master (dbc122e) will decrease coverage by 0.04%.
The diff coverage is 25.00%.

❗ Current head 7a104c1 differs from pull request most recent head 033070e. Consider uploading reports for the commit 033070e to get more accurate results

@@            Coverage Diff             @@
##           master    #1706      +/-   ##
==========================================
- Coverage   95.01%   94.98%   -0.04%     
==========================================
  Files         315      315              
  Lines        8891     8895       +4     
  Branches     1665     1666       +1     
==========================================
+ Hits         8448     8449       +1     
- Misses        372      375       +3     
  Partials       71       71              

Files	Coverage Δ
packages/theme/src/provide.ts	20.00% <25.00%> (+1.81%)	⬆️