fix: added support for onSearch action trigger in multiselect

[sagardspeed2]

Describe your changes

Added support for onSearch action trigger in multiselect

Screenshots [Optional]

Issue ticket number and link

Closes #981

Checklist before requesting a review

• I have performed a self-review of my code
• I have added tests
• I have added a changeset pnpm changeset add
• I have added example usage in the kitchen sink app

[changeset-bot]

🦋 Changeset detected

Latest commit: 8dbff74

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@ensembleui/react-kitchen-sink	Patch
@ensembleui/react-runtime	Patch
@ensembleui/react-preview	Patch
@ensembleui/react-starter	Patch

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[github-actions]

Visit the preview URL for this PR (updated for commit 8dbff74):

https://react-kitchen-sink-dev--pr982-981-search-by-api-in-xqojyrf8.web.app

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