Milestone-D2: SPA + REST API development

What's Changed

• Set up backend folder and simple ExpressJS server by @iynixil in #2
• Setting up react by @tsulim in #4
• Establish firebase connection by @AndrewOng2066 in #6
• Simple Form by @xuelinglow in #7
• Make changes according to coding standard by @xuelinglow in #9
• Functionality Update for question-service by @whitesnowx in #11
• Functionality Delete for question-service by @whitesnowx in #13
• Styling for action buttons for question-service by @whitesnowx in #14
• add button to return to add question view by @whitesnowx in #17
• Update and delete to question-service [M2] by @whitesnowx in #19
• Display selected question's details by @tsulim in #20
• Add scroll back to top for edit button by @xuelinglow in #22
• Handle duplicate question title by @xuelinglow in #23

New Contributors

• @tsulim made their first contribution in #4
• @xuelinglow made their first contribution in #7
• @whitesnowx made their first contribution in #11

Full Changelog: https://github.com/CS3219-AY2425S1/cs3219-ay2425s1-project-g46/commits/Milestone-D2