docs: Add a description for the OpaCluster CRD (#843) #245

Job	Run time
Detect relevant changed files	5s
Build/Publish amd64 Image	7m 58s
Run cargo-udeps	2m 23s
Build/Publish arm64 Image	6m 36s
Publish/Sign 0.0.0-dev Index	33s
Package/Publish 0.0.0-dev Helm Chart	33s
Run OpenShift Preflight Check for 0.0.0-dev-arm64	17s
Run OpenShift Preflight Check for 0.0.0-dev-amd64	20s
Failure Notification	0s
Finished Build and Publish	2s
	18m 47s

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