Combobox async options

[NoelDeMartin]

This PR improves the Combobox in a couple of ways, and it implements new features to support loading options asynchronously. I'm not 100% convinced about the naming, though, so suggestions are welcome.

It also improves the Select component to be backwards compatible with the previous API.

[Copilot]

Pull request overview

This PR extends the solid-ui-combobox to support asynchronously loaded options (via URL templates or a JS provider) and updates the solid-ui-select API to support providing options programmatically while maintaining backward compatibility with DOM-provided <solid-ui-*-option> children.

Changes:

• Add a small debounce() utility and use it to debounce async combobox filtering.
• Add async options support to Combobox (provider + URL-based fetching) and update rendering to support non-selectable / templated options.
• Update Select to accept an options array and dispatch change details, while still supporting DOM child options.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/lib/timing.ts	Adds debounce() helper used for async combobox filtering.
src/lib/components/traits/InputTrait.ts	Broadens value handling to unknown and stringifies form values.
src/components/select/Select.ts	Adds programmatic options API and change-event detail; keeps DOM fallback.
src/components/select/index.ts	Re-exports Select module types/symbols.
src/components/combobox/index.ts	Re-exports Combobox module types/symbols.
src/components/combobox/Combobox.ts	Implements async options support, debounced filtering, and richer option rendering.
src/components/combobox/Combobox.styles.css	Styles loading/error/info rows for async options.
src/components/combobox/Combobox.stories.ts	Adds Storybook examples for async options (JS provider + URL).
package.json	Bumps version and adds @lit/task dependency.
package-lock.json	Locks @lit/task dependency and bumps version.

Comments suppressed due to low confidence (1)

src/components/select/Select.ts:93

• <select>.value is always a string, but option values are typed as unknown. Without normalizing, ?selected can be wrong (e.g. option value 1 vs current value '1'). Normalizing to strings here aligns DOM selection with the component’s string value.

              html`<option
                .value=${option.value}
                ?selected=${option.value === this.value}
              >

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