Chess training environment

Hello,

I set up a working chess training environment tonight:
Coaches can now enter chess tasks and create chess training rooms.

Training tables (either public or personal) can be created in training rooms.
Training tables can be created:

1. Empty
2. From the beginning
3. By importing a game you have played (based on the game ID)
4. By importing a chess task (based on task ID)

Additionally, coaches can have students solve tasks in the training room against a time limit - all solution times are displayed continuously below the training room.

Hence the call to all chess coaches: try conducting some chess training in Vind and provide feedback!

PS! In connection with the opening of the chess training room, I also touched on the part of the ancient code that dealt with chess logic. If you encounter any problems in the chess game, be sure to let us know immediately!