gitea-runner: add the missing Application manifest

The Application was created with kubectl and never committed, so its chart
version, release config and values path lived only on the cluster. That made
the values-path fix a live patch: recreating the app would have restored the
old $values/gitea/runner/values.yaml and broken helm template again.

Both sources are public, so this sits alongside the other Helm-based apps
here rather than in the private repo.

infra/argocd/applications/gitea-runner-application.yaml

@@ -0,0 +1,28 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: gitea-runner
+  namespace: argocd
+spec:
+  project: default
+  sources:
+    # The act_runner chart itself. Values live in this repo, pulled in via the
+    # $values ref below.
+    - repoURL: https://dl.gitea.com/charts/
+      chart: actions
+      targetRevision: 0.1.0
+      helm:
+        # $values resolves to the ref source's repo root, so this path is
+        # relative to the repository, not to the chart.
+        valueFiles:
+          - $values/applications/gitea/runner/values.yaml
+    - repoURL: https://gitea.jsme.be/Jeffrey/Kubernetes-Manifests.git
+      targetRevision: main
+      ref: values
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: gitea
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true