init cli, add start of target docs

pkgs/kubenix.nix

@@ -0,0 +1,60 @@
+{
+  lib,
+  writeShellScriptBin,
+  coreutils,
+  nix,
+  jq,
+}: let
+  name = "kubenix";
+in
+  lib.recursiveUpdate
+  (writeShellScriptBin name ''
+    set -Eeuo pipefail
+
+    NAME=${name}
+    function help() {
+      echo "
+      kubenix - Kubernetes resource management with Nix
+
+      commands:
+        apply    - create resources in target cluster
+        render   - print resource manifests to stdout
+      "
+    }
+
+    function apply() {
+      echo not impremented
+    }
+
+    function render() {
+      ${nix}/bin/nix eval '.#kubernetes' # | ${jq}/bin/jq 'fromjson'
+    }
+
+    while test $# -gt 0; do
+      case "$1" in
+        apply|"")
+          shift
+          apply
+          ;;
+        render)
+          shift
+          render
+          ;;
+        -h|--help)
+          help
+          exit 0
+          ;;
+        -v|--verbose)
+          shift
+          set -x
+          ;;
+        *)
+          help
+          exit 1
+          ;;
+      esac
+    done
+
+
+  '')
+  {meta.description = "";}