Scaffold client-side repository

[NorrisWu0]

• [x] Set up repo folder structure by refactoring the default Next.js template. @NorrisWu0
• [x] Add GitHub Action to test code quality and errors on pull request. @NorrisWu0
• [x] Set up api client with react-query and graphql-request. @NorrisWu0
• [ ] Set up themeContext with styled-components. @miaozhaod
• [x] Set up localisation with i18next @NorrisWu0

[NorrisWu0]

Closing this issue since we have migrated to Jira