add traefik ingressroute template

common/templates/traefik/_ingressroute.tpl

+# https://github.com/traefik/traefik/blob/master/docs/content/routing/providers/kubernetes-crd.md#kind-ingressroute
+{{- define "common.traefik.ingressroute" }}
+apiVersion:  {{ .Values.apiVersion | default "traefik.io/v1alpha1" }}
+kind: IngressRoute
+metadata:
+  name: {{ .Values.name | default "ingress-route" }}
+spec:
+  {{- with .Values.entryPoints }}
+  entryPoints:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  {{- with .Values.routes }}
+  routes:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  {{- with .Values.tls }}
+  tls:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}