feat: Allow more waves for event reward + check max stacks

[fabske0]

What are the changes the user will see?

Event rewards can now be awarded for Rivals 3-6 additionally to the already existing Rival 1 and 2.
If the item already has max stackes, it will award Balls for the respective Tier

Why am I making these changes?

What are the changes from a developer perspective?

Added other rival waves and a check to see if item is at max stacks

Screenshots/Videos

Details

Give.pokeballs.mp4

How to test the changes?

Event config in timed-events.ts

  {
    name: "TEST",
    eventType: EventType.NO_TIMER_DISPLAY,
    startDate: new Date(Date.UTC(2026, 3, 1)),
    endDate: new Date(Date.UTC(2027, 3, 3)),
    classicWaveRewards: [
      { wave: 8, type: "POKEBALL" },
      { wave: 8, type: "MAP" },
      { wave: 8, type: "AMULET_COIN" },
      { wave: 8, type: "MEGA_BRACELET" },
      { wave: 8, type: "SHINY_CHARM" },
    ],
  },

overrides

const overrides = {
  STARTING_WAVE_OVERRIDE: 8,
  STARTING_LEVEL_OVERRIDE: 9999,
  STARTING_MODIFIER_OVERRIDE: [
    { name: "MAP", count: 1 },
    { name: "AMULET_COIN", count: 5 },
    { name: "MEGA_BRACELET", count: 1 },
    { name: "SHINY_CHARM", count: 4 },
  ],
  POKEBALL_OVERRIDE: {
    active: true,
    pokeballs: {
      [PokeballType.POKEBALL]: 99,
      [PokeballType.GREAT_BALL]: 0,
      [PokeballType.ULTRA_BALL]: 0,
      [PokeballType.ROGUE_BALL]: 0,
      [PokeballType.MASTER_BALL]: 0,
    },
  },
} satisfies Partial<InstanceType<OverridesType>>;

Checklist

• The PR content is correctly formatted:
  • I'm using beta as my base branch
  • The current branch is not named beta, main or the name of another long-lived feature branch
  • I have provided a clear explanation of the changes within the PR description
  • The PR title matches the Conventional Commits format (as described in CONTRIBUTING.md)
• The PR is self-contained and cannot be split into smaller PRs
• There is no overlap with another open PR
• The PR has been confirmed to work correctly:
  • I have tested the changes manually
  • The full automated test suite still passes (use pnpm test:silent to test locally)
  • I have created new automated tests (pnpm test:create) or updated existing tests related to the PR's changes if necessary
• I have provided screenshots/videos of the changes (if applicable)
  • I have made sure that any UI changes work for both the default and legacy UI themes (if applicable)

Are there any localization additions or changes? If so:

• I have created an associated PR on the locales repository
  • If so, include a link to the PR here: _____
• I have contacted the Translation Team on Discord for proofreading/translation

Does this require any additions or changes to in-game assets? If so:

• I have created an associated PR on the assets repository
  • If so, include a link to the PR here: _____