ai-rework: Add Matchup Score modifiers

[innerthunder]

What are the changes the user will see?

The AI should now account for ongoing battle effects when evaluating whether it should switch Pokemon. These battle effects include:

• Volatile status effects (e.g. Confusion)
• Hazards (e.g. Spikes)
• Weather
• Terrain

Why am I making these changes?

Part of the AI Rework.

What are the changes from a developer perspective?

• Added Pokemon.applyMatchupScoreModifiers to apply Matchup Score (MUS) modifiers outside of the normal damage/EAS-based scoring.
• Added new methods to BattlerTag and ArenaTag to apply tag-specific MUS modifiers.
• Added Weather- and Terrain-based MUS modifier logic.

For more information on the new MUS modifiers, see the "Misc. Score Modifiers" tab in the Effect Scores Sheet

How to test the changes?

• pnpm typecheck
• pnpm depcruise
• pnpm test:silent

New unit tests are WIP.

Checklist

• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I tested the changes manually?
• Are all unit tests still passing? (pnpm test:silent)
  • Have I created new automated tests (pnpm test:create) or updated existing tests related to the PR's changes?