Implement CRUD for frontend

[ys112]

• Done up a basic table and input form showing all the data and ability to CRUD.
• Includes simple form validation and title duplicate check.
• Set /question as landing page for D2 requirements.
• Added questions API calling services.

[ys112]

Could you move QuestionComponent and questions.module.css to components folder instead? I think routes should contain code for route and (maybe) data fetching only. Having css files under routes is not good for organising.

I suggest that we can organise the components folder either by functionality (a component is a Form/Modal or a whole page) or by business domain (a component is for Question-related routes or User routes). It might look like this:

└── src/
    └── components/
        ├── Pages/
        │   └── Question/
        │       └── QuestionListPage.tsx
        ├── Modal/
        │   └── ModalView.tsx
        ├── NumberedPageList.tsx
        └── Form/
            └── Question/
                └── QuestionForm.tsx

Code is now organised using business domain.