Add egg gacha system and various minor changes

Add egg gacha system; remove certain mythical Pokemon from the wild pool as egg exclusive; add egg vouchers with UI; rework Shiny Charm odds; fix trainer Pokemon shiny odds not properly ignoring Shiny Charm modifier

src/system/achv.ts

@@ -31,6 +31,14 @@ export class Achv {
     this.conditionFunc = conditionFunc;
   }
 
+  getName(): string {
+    return this.name;
+  }
+
+  getIconImage(): string {
+    return this.iconImage;
+  }
+
   setSecret(hasParent?: boolean): this {
     this.secret = true;
     this.hasParent = !!hasParent;
@@ -118,10 +126,13 @@ export const achvs = {
   MEGA_EVOLVE: new Achv('Megamorph', 'Mega evolve a Pokémon', 'mega_bracelet', 50),
   SPLICE: new Achv('Infinite Fusion', 'Splice two Pokémon together with DNA Splicers', 'dna_splicers', 10),
   MINI_BLACK_HOLE: new ModifierAchv('A Hole Lot of Items', 'Acquire a Mini Black Hole', 'mini_black_hole', 25, modifier => modifier instanceof TurnHeldItemTransferModifier).setSecret(),
-  CATCH_LEGENDARY: new Achv('Legendary', 'Catch a legendary Pokémon', 'mb', 50).setSecret(),
   CATCH_MYTHICAL: new Achv('Mythical', 'Catch a mythical Pokémon', 'strange_ball', 50).setSecret(),
+  CATCH_LEGENDARY: new Achv('Legendary', 'Catch a legendary Pokémon', 'mb', 75).setSecret(),
   SEE_SHINY: new Achv('Shiny', 'Find a shiny Pokémon in the wild', 'pb_gold', 75),
   SHINY_PARTY: new Achv('That\'s Dedication', 'Have a full party of shiny Pokémon', 'shiny_charm', 100).setSecret(true),
+  HATCH_MYTHICAL: new Achv('Mythical Egg', 'Hatch a mythical Pokémon from an egg', 'pair_of_tickets', 75).setSecret(),
+  HATCH_LEGENDARY: new Achv('Legendary Egg', 'Hatch a legendary Pokémon from an egg', 'mystic_ticket', 100).setSecret(),
+  HATCH_SHINY: new Achv('Shiny Egg', 'Hatch a shiny Pokémon from an egg', 'golden_mystic_ticket', 100).setSecret(),
   HIDDEN_ABILITY: new Achv('Hidden Potential', 'Catch a Pokémon with a hidden ability', 'ability_charm', 75),
   PERFECT_IVS: new Achv('Certificate of Authenticity', 'Get perfect IVs on a Pokémon', 'blunder_policy', 100),
   CLASSIC_VICTORY: new Achv('Undefeated', 'Beat the game in classic mode', 'relic_crown', 150)