YH4F Official release!

Just 50 commits to get here! (It is 51 now, since I forgot to add a LICENSE, but it is still 50, since the first commit was from gitlab itself...)

Thank you all YH4F team for the amazing coding competition that I have been taking part in for the last 3 years.
Even though I never won (yet), I still loved every second of it and I am sad that this was my last time.

To make judging easier, I thought why not create a tag of the current state,
so I can continue working on this project as I intend to make it as user-friendly as possible by taking feedback from my users.