feat: support a Select editor for table inline-edit cells via submitValue

[ernst-dev]

Description

Adds support for using a Select / dropdown editor in Table inline-editable cells, with a first-class submit-on-selection experience.

Table inline editing already allows editConfig.editingCell to render any control (including Select, Autosuggest, and Multiselect). The gap: cellContext.submitValue could only submit the value currently held in React state. A dropdown editor that wants to submit as soon as an option is chosen had to call setValue() and then submitValue() in the same change handler — but the setValue state update has not been applied yet, so a stale value was submitted.

submitValue now accepts an optional explicit value. When a value is passed, it is submitted directly, bypassing the pending setValue update:

editingCell(item, { currentValue, submitValue }) {
  return (
    <Select
      autoFocus={true}
      expandToViewport={true}
      selectedOption={/* ... */}
      options={options}
      onChange={({ detail }) => submitValue(detail.selectedOption.value)}
    />
  );
}

Calling submitValue() with no arguments keeps the existing behaviour of submitting currentValue, so the change is opt-in and fully backward compatible (the only public API change is widening TableProps.CellContext.submitValue from () => void to (value?: V) => void).

Changes:

• Widen and document TableProps.CellContext.submitValue → (value?: V) => void.
• Update editingCell docs describing submit-on-selection for dropdown editors.
• New dev page pages/table/inline-edit-select.page.tsx demonstrating a Select that submits on selection alongside the classic submit-button flow.
• Unit tests for explicit-value submission and the explicit-undefined no-op case.
• Refreshed the table documenter snapshot for the doc change.

Related links, issue #, if available: AWSUI-61898

Note on the ticket: AWSUI-61898 (V2168547328) currently resolves to an unrelated CloudWatch NPM-credential-rotation alarm ticket, not a component spec. This PR was implemented from the feature description (inline-editable table cell whose editor is a Select/dropdown) and fills the identified gap rather than duplicating the existing editingCell capability.

How has this been tested?

• npx eslint on all changed files — clean.
• Full npm run build (quick-build + pages + docs + definitions) — succeeds (only unrelated size-limit warnings).
• Unit tests: src/table/__tests__/inline-editor.test.tsx (15 tests incl. 2 new), inline-editing-test-utils.test.tsx, and the documenter snapshot suite — all green.
• New dev page compiles and bundles as part of buildPages; verify manually at /#/light/table/inline-edit-select (select a Status option → submits immediately; Size uses the submit button).

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.61%. Comparing base (f97729a) to head (bc6b46e).

Additional details and impacted files

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##             main    #4815   +/-   ##
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  Coverage   97.61%   97.61%           
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  Files         952      952           
  Lines       30816    30820    +4     
  Branches    11318    11318           
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+ Hits        30081    30085    +4     
- Misses        688      728   +40     
+ Partials       47        7   -40     

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