Add Support for Searching by Multiple Option Properties to ComboboxControl

[dhruvikpatel18]

Why?

This PR is intended to solve issue mentioned here: #68760

How?

• Introduced a new filterKeys prop that allows specifying which properties should be considered when filtering options.
• Updated the filtering logic to iterate through the defined properties and match against the input value.
• Added support for partial matching across specified properties.
• Updated the component's README documentation to reflect the new feature and usage guidelines.

Testing Instructions

1. Open the WordPress block editor.
2. Insert a block that uses the ComboboxControl component.
3. Pass an array of options containing multiple properties (e.g., value, label, description).
4. Set the filterKeys prop to ['label', 'description'].
5. Type a query in the search input and verify that matching occurs across the specified fields.
6. Ensure selections work correctly and the correct value is passed to the onChange handler.

Screenshots or screencast

ComboboxControl.Screencast.mov

[github-actions]

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Co-authored-by: dhruvikpatel18 <[email protected]>
Co-authored-by: picocodes <[email protected]>

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[picocodes]

The actual component uses filterFields and not filterProperties

[dhruvikpatel18]

Thanks for the feedback, I have updated it.

[picocodes]

The actual component uses filterFields and not filterProperties

[dhruvikpatel18]

Thanks for the feedback, I have updated it.