feat: add enable/disable toggle for code indexing #11327

Job	Run time
check-translations	37s
compile	2m 0s
knip	41s
check-openrouter-api-key	4s
platform-unit-test (ubuntu-latest)	3m 14s
platform-unit-test (windows-latest)	5m 29s
integration-test	7m 49s
notify-slack-on-failure	-1s
	19m 53s

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