Added simple debouncing to search suggestions to reduce queries while user is typing

[dmitrymatio]

Description

This is a simple debouncing fix to reduce number of queries made as a result of queries made onchange of input bar.
500ms delays between attempts seemed to be a decent middle ground between reducing queries and the user experience.

Currently logging query count to console for testing.

Related Issue

Motivation and Context

We're worried about exceeding our Algolia plan's budget for actions which primarily consists of multi index queries.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.