Add app-of-apps Helm chart for ArgoCD

Renders ArgoCD Applications from values.yaml, including one for the
valheim-gitops chart. Includes a one-time bootstrap manifest to
register this chart itself as an ArgoCD Application.

Co-authored-by: Copilot <[email protected]>

templates/application.yaml

@@ -0,0 +1,36 @@
+{{- range .Values.applications }}
+{{- if .enabled }}
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: {{ .name }}
+  namespace: {{ $.Values.argocd.namespace }}
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  project: {{ $.Values.argocd.project }}
+  source:
+    repoURL: {{ .source.repoURL }}
+    targetRevision: {{ .source.targetRevision }}
+    path: {{ .source.path }}
+    {{- if or (and .source.helm .source.helm.parameters) (and .source.helm .source.helm.valueFiles) }}
+    helm:
+      {{- if .source.helm.parameters }}
+      parameters:
+        {{- toYaml .source.helm.parameters | nindent 8 }}
+      {{- end }}
+      {{- if .source.helm.valueFiles }}
+      valueFiles:
+        {{- toYaml .source.helm.valueFiles | nindent 8 }}
+      {{- end }}
+    {{- end }}
+  destination:
+    server: {{ .destination.server }}
+    namespace: {{ .destination.namespace }}
+  {{- if .syncPolicy }}
+  syncPolicy:
+    {{- toYaml .syncPolicy | nindent 4 }}
+  {{- end }}
+---
+{{- end }}
+{{- end }}