Refactor: jumpstart sets must use shared code to generate single boosters

Jumpstart is special booster type of x20 cards. Cards split by themes instead random:
https://mtg.fandom.com/wiki/Jumpstart

Xmage support it by special jumpstart game mode only (see `JumpstartPoolGenerator` and `\resources\jumpstart\jumpstart.txt`).

Problems

1. [ ] There are 3 jumpstart sets, but only 1 supported:
* [x] 2020 - Jumpstart
* [ ] 2022 - Jumpstart 2022
* [ ] 2024 - Foundations Jumpstart
2. [ ] Jumpstart boosters supported by special game mode instead any;
3. [ ] Half decks jumpstart from [Ravnica: Clue Edition](https://mtg.fandom.com/wiki/Ravnica:_Clue_Edition)

What can be done:
* improved code of `JumpstartPoolGenerator` to use predefined boosters from all 3 sets instead 1;
* override `createBooster` and use shared code from `JumpstartPoolGenerator` to generate single boosters (see code example from `MysteryBooster`);
* so jumpstart boosters can be used in all other game modes after improve;