Add helmfile.yaml for argocd, hello-world, and rancher-to-argocd-controller applications; define releases for each chart.

Author: max06

apps/argocd/helmfile.yaml

@@ -0,0 +1,4 @@
+---
+releases:
+  - name: argocd
+    chart: ./

apps/hello-world/helmfile.yaml

@@ -0,0 +1,4 @@
+---
+releases:
+  - name: hello-world
+    chart: ./

apps/rancher-to-argocd-controller/helmfile.yaml

@@ -0,0 +1,4 @@
+---
+releases:
+  - name: rancher-to-argocd-controller
+    chart: ./