feat: add custom toggle input to FormKit

[LIlGG]

What type of PR is this?

/kind feature
/area ui

What this PR does / why we need it:

为 formkit 新增 toggle 组件。

使用方式：

<FormKit
  type="toggle"
  name="toggle"
  validation="required"
  render-type="image"
  multiple
  :size="200"
  :gap="12"
  label="选择图片"
  help="选择图片作为背景，支持单选和多选"
  :options="[
    {
      label: '图文1',
      render: 'https://placehold.co/600x400',
      value: '1',
    },
    {
      label: '图文2',
      render: 'https://placehold.co/400x400',
      value: '2',
    },
    {
      label: '图文3',
      render: 'https://placehold.co/600x600',
      value: '3',
    },
    {
      label: '图文4',
      render: 'https://placehold.co/800x800',
      value: '4',
    },
  ]"
></FormKit>

Does this PR introduce a user-facing change?

为 FormKit 新增 `toggle` 组件

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.07%. Comparing base (42c374d) to head (f7e441b).
⚠️ Report is 378 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8104      +/-   ##
============================================
+ Coverage     59.55%   61.07%   +1.51%     
- Complexity     3812     3996     +184     
============================================
  Files           677      696      +19     
  Lines         23248    23755     +507     
  Branches       1500     1551      +51     
============================================
+ Hits          13846    14508     +662     
+ Misses         8764     8507     -257     
- Partials        638      740     +102     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud