docs: Add DAG bundles guide as alternative to git-sync for multi-repo… #365

Job	Run time
Detect relevant changed files	7s
Run cargo-udeps	2m 3s
Build/Publish arm64 Image	5m 39s
Build/Publish amd64 Image	6m 51s
Package/Publish 0.0.0-dev Helm Chart	34s
Publish/Sign 0.0.0-dev Index	30s
Run OpenShift Preflight Check for 0.0.0-dev-amd64	18s
Run OpenShift Preflight Check for 0.0.0-dev-arm64	16s
Failure Notification	0s
Finished Build and Publish	3s
	16m 21s

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