Demi's Sky Arena

Finally! Added the possibility to create pre-set waves.

If the wave number is in the list of preset waves, this wave will have its own preset list of mobs, mob stat coefficient and loot reward table.

If the current wave is not in the list of predefined waves, everything will be the same as before.

You can see an example of an arena with preset waves in skyarena.json

To do this, don't forget to regenerate skyarena.json file (delete it to make a new one appear)

Also, the analyzer now displays information about pre-set waves and information about the wave from which the mobs' stats start to grow, the rate of stat growth for 10 waves, the current stat coefficient.