feat(pro:search): add IxProSearchShortcut comp and shortcut slots

[sallerli1]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

快捷面板shortcuts不支持自定义

What is the new behavior?

增加插槽：shortcuts, shortcuts, shortcutLabel, shortcutIcon 支持自定义shortcuts
增加 IxProSearchShortcut 组件暴露，方便自定义shortcuts

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1594 (9036c46) into main (799ac59) will not change coverage.
The diff coverage is n/a.

❗ Current head 9036c46 differs from pull request most recent head dfcae27. Consider uploading reports for the commit dfcae27 to get more accurate results

@@           Coverage Diff           @@
##             main    #1594   +/-   ##
=======================================
  Coverage   92.74%   92.74%           
=======================================
  Files         332      332           
  Lines       30707    30707           
  Branches     3510     3510           
=======================================
  Hits        28480    28480           
  Misses       2227     2227