Add resource limits to all overlays with CI enforcement and documentation #45

Job	Run time
Lint YAML files	20s
Lint shell scripts	4s
Discover overlays	4s
Verify documented resources	19s
Verify resource limits (core)	13s
Verify resource limits (metrics)	14s
Validate Kustomize (core/stack)	6s
Validate Kustomize (metrics/base)	14s
Validate Kustomize (core/base)	7s
Validate Kustomize (metrics/stack)	6s
	1m 47s

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