Move hacks to hack (match k8s pattern).

hack/awker.sh

@@ -0,0 +1,16 @@
+function showDeps {
+  echo "==== begin $1 =================================="
+  find $1 -name "*.go" |\
+    xargs grep \"sigs.k8s.io/kustomize/??? |\
+    grep -v "/api/" |\
+    sed 's|"sigs.k8s.io/kustomize/v3/||' |\
+    awk '{ printf "%40s  %s\n", $2, $1 }' |\
+    sed 's|"  \./| |' |\
+    sed 's|:$||' |\
+    sort | uniq
+  echo "==== end $1 =================================="
+}
+
+
+showDeps ./plugin
+showDeps ./kustomize