Add navigational search component #3758

Job	Run time
npm	2m 37s
integration	4m 5s
build (windows-latest)	8m 7s
synthetics	4m 5s
build-link-index-updater-lambda / build	1m 26s
build (macos-latest)	7m 45s
build-api-lambda / build	2m 57s
validate-assembler	1m 41s
build (ubuntu-latest)	5m 50s
	38m 33s

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