feat: add .gitignore and apps/template for new apps

apps/template/manifests/app-pvc.yaml

@@ -0,0 +1,16 @@
+# PVC 範本 - Longhorn 儲存
+# 使用方式：將 {{APP_NAME}} 替換為你的應用名稱
+# 儲存大小可調整：1Gi, 5Gi, 10Gi...
+
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: {{APP_NAME}}-pvc
+  namespace: default
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: longhorn
+  resources:
+    requests:
+      storage: {{SIZE|5Gi}}