feat: inplement auth for cases

frontend/messages/en.json

@@ -154,6 +154,8 @@
     "actions": "Actions",
     "delete_case": "Delete test case",
     "delete": "Delete",
+    "close": "Close",
+    "are_you_sure": "Are you sure you want to delete test cases?",
     "new_test_case": "New Test Case",
     "status": "Status",
     "critical": "Critical",

frontend/messages/ja.json

@@ -153,6 +153,8 @@
     "actions": "アクション",
     "delete_case": "テストケースを削除",
     "delete": "削除",
+    "close": "閉じる",
+    "are_you_sure": "テストケースを削除してもよろしいですか?",
     "new_test_case": "新規テストケース",
     "status": "ステータス",
     "critical": "致",