feat: add disabled prop to radio and checkbox groups

[bitpshr]

Type: bug / feature

The following has been addressed in the PR:

• [x] There is a related issue
• [x] All code matches the style guide
• [x] Unit tests are included in the PR
• [x] For new widgets, an entry has been added to the .dojorc
• [x] For new widgets, theme.variant() is added to the root domnode
• [x] Any widget variant uses theme.compose like this
• [x] WidgetProperties are exported

Description:

This pull request adds a top-level disabled prop to both CheckboxGroup and RadioGroup and updates tests accordingly.

Resolves #1698 Replaces #1711

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dojo.widgets – ./

🔍 Inspect: https://vercel.com/dojo/dojo.widgets/FLqGJcjWu8BifbuwQthNUDFg7e4D
✅ Preview: https://dojowidgets-git-fork-bitpshr-feat-checkbox-radio-grou-66763d.vercel.app

widget-test-docs – ./

🔍 Inspect: https://vercel.com/dojo/widget-test-docs/2B5V6i9grqxPrBNiGspekvaK9pav
✅ Preview: https://widget-test-do-git-fork-bitpshr-feat-checkbox-radio-grou-878bef.vercel.app

[codecov[bot]]

Codecov Report

Merging #1745 (aaa9553) into master (4b0ce16) will increase coverage by 0.12%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1745      +/-   ##
==========================================
+ Coverage   90.24%   90.36%   +0.12%     
==========================================
  Files          94       94              
  Lines        5116     5129      +13     
  Branches     1392     1398       +6     
==========================================
+ Hits         4617     4635      +18     
+ Misses        244      243       -1     
+ Partials      255      251       -4     

Impacted Files	Coverage Δ
src/checkbox-group/index.tsx	100.00% <100.00%> (ø)
src/radio-group/index.tsx	100.00% <100.00%> (ø)
src/context-menu/index.tsx	100.00% <0.00%> (ø)
src/speed-dial/index.tsx	97.52% <0.00%> (+0.08%)	:arrow_up:
src/list/index.tsx	81.65% <0.00%> (+1.71%)	:arrow_up:

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