feat: use unplugin icons

[ssiyad]

• Add https://github.com/antfu/unplugin-icons
• Remove https://github.com/jpkleemans/vite-svg-loader

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: -0.03 ⚠️

Comparison is base (de4eb77) 12.79% compared to head (f417682) 12.76%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1102      +/-   ##
==========================================
- Coverage   12.79%   12.76%   -0.03%     
==========================================
  Files          52       52              
  Lines        1782     1786       +4     
==========================================
  Hits          228      228              
- Misses       1554     1558       +4     

Impacted Files	Coverage Δ
helpdesk/config/desktop.py	0.00% <ø> (ø)
helpdesk/config/docs.py	0.00% <0.00%> (ø)
helpdesk/helpdesk/doctype/hd_agent/hd_agent.py	0.00% <ø> (ø)
helpdesk/helpdesk/doctype/hd_article/hd_article.py	0.00% <ø> (ø)
...doctype/hd_article_category/hd_article_category.py	0.00% <ø> (ø)
...doctype/hd_article_feedback/hd_article_feedback.py	0.00% <ø> (ø)
...elpdesk/doctype/hd_article_item/hd_article_item.py	0.00% <ø> (ø)
..._sub_category_item/hd_article_sub_category_item.py	0.00% <ø> (ø)
...k/doctype/hd_canned_response/hd_canned_response.py	0.00% <ø> (ø)
...lpdesk/helpdesk/doctype/hd_customer/hd_customer.py	44.44% <ø> (ø)
... and 20 more

... and 40 files with indirect coverage changes

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