fix(ci): add publish script with lint, tag and helm package+push

.gitignore

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+/*.tgz

README.adoc

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+= helm-charts
+
+== Usage
+
+Helm must be installed and setup to your kubernetes cluster to use the charts.
+Refer to Helm's https://helm.sh/docs[documentation] to get started.
+Once Helm has been set up correctly, fetch the charts as follows:
+
+[source,bash]
+----
+helm pull oci://codeberg.org/wrenix/helm-charts/<chart>
+----
+
+You can install a chart release using the following command:
+
+[source,bash]
+----
+helm install <release> oci://codeberg.org/wrenix/helm-charts/<chart> --values values.yaml
+----
+
+To uninstall a chart release use `helm`'s delete command:
+
+[source,bash]
+----
+helm uninstall <release>
+----

publish.sh

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+#/bin/sh
+
+HELM_REPO=${HELM_REPO:-oci://codeberg.org/wrenix/helm-charts}
+
+for p in * ; do
+  if [ ! -d $p ]; then
+    continue;
+  fi
+
+  echo "${p}:";
+
+  # last pkg  
+  lastTag=$(git tag -l "${p}-v*" | tail -1)
+  lastVersion=${lastTag#${p}-v}
+  echo "last pkg: ${lastVersion}"
+
+  # Chart version
+  v=$(dasel -f "${p}/Chart.yaml" -s version)
+  echo "version: ${v}";
+
+  #  should be increased?
+  tag="${p}-v${v}"
+  # check if a old version exists
+  if [ -n $lastTag ]; then
+  
+    # check if changes since new version happen
+    changes=$(git diff "${lastTag}" -- "${p}" | wc -l);
+    if [ "$changes" -gt "0" ]; then
+      # check / lint if version was increased correct
+      if [ "$tag" == "$lastTag" ]; then
+        echo "changed helmchart should create new pkg"
+        echo $(git diff "${lastTag}" -- "${p}" | wc -l);
+        exit 1
+      fi
+    else
+      echo "nothing todo"
+      echo
+      continue;
+    fi
+  fi
+  helm package "${p}"
+  helm push "${p}-${v}.tgz" "${HELM_REPO}";
+
+  git tag "${tag}" --no-sign;
+  git push --tags;
+
+  echo
+done