feat: Add hierarchical .roo configuration resolution for mono-repos #17559

Job	Run time
knip	44s
platform-unit-test (ubuntu-latest)	4m 10s
platform-unit-test (windows-latest)	4m 24s
check-translations	41s
compile	2m 5s
check-openrouter-api-key	2s
integration-test	3m 6s
	15m 12s

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