[WC-3223]: Rename Checkbox Radio Selector widget to Option Selector

[rahmanunver]

Closes WC-3223.

Renamed

Where	From	To
Studio Pro toolbox (<name>)	Check box / radio selector	Option Selector
Marketplace listing 245825 (appName)	Checkbox Radio Selection	Option Selector
package.json description, README, editor dropzones, design-time fallback captions, read-only style description	old names	Option Selector

<description> was empty and is now filled in — it mentions checkbox and radio button so toolbox and Marketplace search still find the widget.

CHANGELOG.md gets an [Unreleased] → Changed entry. No version bump.

Unchanged (keeps existing apps working)

Widget ID, package.xml, widgetName, mpk name, npm package name, folder, generated typings, and the widget-checkbox-radio-selection* CSS classes.

Verified: all 34 property keys and 141 XML attribute tokens are identical to main, git diff typings/ is empty, the runtime bundle contains no renamed strings, and the MPK filename plus every internal path are unchanged — so an upgrade is a drop-in replacement.

Note: widgets dropped in Studio Pro after this ships get auto-names like optionSelector1; existing instances keep theirs, so current e2e locators still match.

Build 7/7, unit tests 8/8.

[github-actions]

AI Code Review

✅ Approved — no issues found

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What was reviewed

File	Change
CHANGELOG.md	Added [Unreleased] → Changed entry for the rename
README.md	Retitled heading; updated usage step and package-name callout
package.json	Updated description and marketplace.appName; identity fields frozen
src/CheckboxRadioSelection.xml	<name> → "Option Selector"; <description> filled in; readOnlyStyle description updated
src/CheckboxRadioSelection.editorConfig.ts	Three dropzone placeholder strings updated
src/helpers/utils.ts	emptyStringFormat constant updated
src/helpers/Preview/PreviewCaptionsProvider.tsx	emptyCaption updated
src/helpers/Association/utils.ts	Comment-only update
src/helpers/Database/utils.ts	Comment-only update
src/helpers/EnumBool/utils.ts	Comment-only update
src/helpers/Static/utils.ts	Comment-only update
src/ui/CheckboxRadioSelection.scss	Banner comment updated
src/ui/CheckboxRadioSelectionPreview.scss	Banner comment updated; "— editor preview" suffix added
openspec/changes/rename-option-selector/	New per-package OpenSpec artifacts (proposal, design, spec, tasks)

Skipped (out of scope): dist/, pnpm-lock.yaml, openspec/ content (not runtime code)

Note: gh pr checks required interactive approval in this environment — CI check status could not be confirmed automatically. The PR body states "Build 7/7, unit tests 8/8" which is consistent with the scope of this change (no runtime logic touched).

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Positives

• Identity contract held perfectly: widget ID, widgetName, mpkName, packagePath, marketplace.appNumber, CSS class prefix (widget-checkbox-radio-selection*), and generated typings filename are all untouched — exactly correct for a published widget rename.
• The new <description> satisfies the discoverability requirement: it explicitly names both "checkbox" and "radio button", so toolbox search for either term still surfaces the widget under its new name.
• OpenSpec artifacts are correctly scoped per-package (inside packages/pluggableWidgets/checkbox-radio-selection-web/openspec/) — respects the monorepo root restriction.
• CHANGELOG entry is user-facing and accurate ("existing pages using it keep working without changes") — right level of detail for a changelog.
• Design doc clearly articulates the two overlapping string sets (identity vs. presentation) and justifies every decision, including the accepted trade-off on the orphaned readOnlyStyle translation key.