Built in randomizer and shiny chance editor

• New Cheats
  1. None
• New Features
  1. Spawn ID now has a Random option. Will randomize a Pokémon between 1 and 802 along with randomizing the form.
  2. Spawn Level now has a passthrough option that leaves wild level untouched.
  3. Shiny encounter odds can now be changed. From 1/1 (always shiny) to 1/4096 (Normal odds) it increases in powers of two: 1/1, 1/2, 1/4, 1/8, 1/16, 1/32 ... etc.
• Bug fixes:
  1. 100% Catch rate can now properly be disabled
  2. Minior's form cannot be set with the Spawner due to how the game generates Minior specifically. Form option updated to reflect this.
  3. Unobtainable items from the Berry and Medicine bags have been removed. Running the code again will remove unobtainable items that were previously granted.