feat: add crossplane-system

crossplane-system/README.md

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+# Crossplane System
+
+Install Crossplane System.
+
+Do not use the `base` directory directly, as you will need to patch the `channel` based on the version of OpenShift you are using, or the version of the operator you want to use.
+
+The current _overlays_ available are for the following channels:
+
+- [stable](operator/overlays/stable)
+
+## Usage
+
+If you have cloned the `gitops-catalog` repository, you can install Crossplane System based on the overlay of your choice by running from the root (`gitops-catalog`) directory.
+
+```
+oc apply -k crossplane-system/operator/overlays/<channel>
+```
+
+Or, without cloning:
+
+```
+oc apply -k https://github.com/redhat-cop/gitops-catalog/crossplane-system/operator/overlays/<channel>
+```
+
+As part of a different overlay in your own GitOps repo:
+
+```
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - https://github.com/redhat-cop/gitops-catalog/crossplane-system/operator/overlays/<channel>?ref=main
+```

crossplane-system/base/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - namespace.yaml
+  - role-binding.yaml

crossplane-system/base/namespace.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: crossplane-system
+  labels:
+    openshift.io/cluster-monitoring: "true"

crossplane-system/base/role-binding.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: nonroot-v2-scc
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: system:openshift:scc:nonroot-v2
+subjects:
+  - kind: Group
+    apiGroup: rbac.authorization.k8s.io
+    name: system:serviceaccounts:crossplane-system

crossplane-system/overlays/stable/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - ../../base
+
+helmCharts:
+  - name: crossplane
+    releaseName: crossplane
+    repo: https://charts.crossplane.io/stable
+    namespace: crossplane-system