kube-capacity: add page (#2864)

pages/common/kube-capacity.md

@@ -0,0 +1,17 @@
+# kube-capacity
+
+> A simple CLI that provides an overview of the resource requests, limits, and utilization in a Kubernetes cluster.
+> Combine the best parts of `kubectl top` and `kubectl describe` into a CLI focused on cluster resources.
+> Homepage: <https://github.com/robscott/kube-capacity>.
+
+- Output a list of nodes with the total CPU and Memory resource requests and limits:
+
+`kube-capacity`
+
+- Include pods:
+
+`kube-capacity -p`
+
+- Include utilization:
+
+`kube-capacity -u`