Add validate command for recipe pre-flight checks #747

Job	Run time
Integration test	5m 6s
Lint	2m 8s
Unit test	1m 39s
Check documentation is up to date	1m 30s
E2E test (opstack)	3m 17s
E2E test (opstack --enable-latest-fork=10)	2m 59s
E2E test (opstack --external-builder http://host.docker.internal:4444)	3m 32s
E2E test (opstack --enable-latest-fork=0)	3m 32s
E2E test (l1)	3m 0s
E2E test (l1 --with-prometheus)	3m 25s
E2E test (l1 --use-native-reth)	3m 9s
	33m 17s

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