feat: add KOTS HelmChart manifest and copy to release

Adds helmchart.yaml (kots.io/v1beta2 HelmChart) to the project root
and includes it in the "Copy Replicated configs" step of both the
release and PR workflows.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: aa-replicated

.github/workflows/pr.yml

@@ -57,6 +57,7 @@ jobs:
         run: |
           cp .replicated release/
           cp embedded-cluster-config.yaml release/
+          cp helmchart.yaml release/
 
       - name: Create Replicated release
         id: create-release

.github/workflows/release.yml

@@ -54,6 +54,7 @@ jobs:
         run: |
           cp .replicated release/
           cp embedded-cluster-config.yaml release/
+          cp helmchart.yaml release/
 
       - name: Create Replicated release
         id: create-release

helmchart.yaml

@@ -0,0 +1,14 @@
+apiVersion: kots.io/v1beta2
+kind: HelmChart
+metadata:
+  name: gameshelf
+spec:
+  chart:
+    name: gameshelf
+    chartVersion: ""
+  values:
+    image:
+      tag: repl{{ '{{' }} .VersionLabel {{ '}}' }}
+    global:
+      imagePullSecrets:
+        - name: '{{repl ImagePullSecretName }}'