change(Apps): Project-Eclipse 3, Automatically generate item.yaml (#1178)

* change(Apps): automatically generate item.yaml

* bump jacket for testing

* update dev devcontainer reference

* update container versions

tools/mergeitems.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -eu
+
+# This script requires pyBump to be installed using pip.
+
+for train in stable incubator develop non-free deprecated; do
+  for chart in charts/${train}/*; do
+    if [ -d "${chart}" ]; then
+      echo "merging item.yaml into chart.yaml"
+      cat ${chart}/SCALE/item.yaml >>  ${chart}/chart.yaml
+    fi
+  done
+done