feat(localization): update project view header translations and enhance UI functionality

- Added new translations for "Import task", "Refresh project", "Save as template", and "Invite" in Albanian, German, English, Spanish, and Portuguese.
- Refactored `ProjectViewHeader` component to optimize rendering with memoization and improved state management.
- Enhanced task creation and subscription handling with better performance and error management.
- Improved dropdown and button actions for a more intuitive user experience.

worklenz-frontend/public/locales/pt/project-view/project-view-header.json

@@ -1,5 +1,6 @@
 {
     "importTasks": "Importar tarefas",
+    "importTask": "Importar tarefa",
     "createTask": "Criar tarefa",
     "settings": "Configurações",
     "subscribe": "Inscrever-se",
@@ -9,5 +10,8 @@
     "endDate": "Data de fim",
     "projectSettings": "Configurações do projeto",
     "projectSummary": "Resumo do projeto",
-    "receiveProjectSummary": "Receber um resumo do projeto todas as noites."
+    "receiveProjectSummary": "Receber um resumo do projeto todas as noites.",
+    "refreshProject": "Atualizar projeto",
+    "saveAsTemplate": "Salvar como modelo",
+    "invite": "Convidar"
 }