Improve the quest UI earnings to allow users to customize egg or Pokémon earnings

[Palbolsky]

Description

This PR improves the quest UI earnings to allow users to more accurately select information about a Pokémon or egg.

The data structure has been adapted: we were using a dbSymbol, now an object. The object used is the same as the trainer's or group's creatures.

With the modification of the data structure, it's a breaking change for PSDK. Changes are required to support the functionality and avoid crashes.

Closes #38

Tests to perform

• Add a Pokémon or egg quest reward ;
• Edit a Pokémon or egg quest reward ;
• Change a money reward (or other) to Pokémon or egg quest reward ;
• Check if the data is correct in the json ;
• Check that the migration works ;
• Check the creatures of a group or a trainer can be managed correctly (no regression) ;
• PSDK manages correctly the feature.

Tip

For the PSDK implementation, make sure to use the to_creature method to transform the Encounter data to Creature one.

Screenshot

[AerunDev]

J'ai pu tester toute la chaîne de Studio à PSDK, et ça fonctionne super bien. 😄
Bien joué pour l'implémentation !

[AerunDev]

Je mets une note ici, mais il faudra qu'on voit comment faciliter l'implémentation de la PR #378 de logicallyanime.