Show rarity-scaled boss shard values in tooltips

[jneb802]

Problem

The Elder, Bonemass, Moder, Queen, and Fader boss shard tooltips show only the effect name. Their configured rarity values change the runtime result, but players cannot see those differences and can reasonably conclude that every rarity is identical.

Changes

• Show Elder root radius and cooldown.
• Show Bonemass poison damage, cooldown, and radius.
• Show Moder frost damage and rarity cooldown.
• Show Queen regeneration per stack, stack limit, and duration.
• Show Fader physical-to-elemental conversion percentage.
• Reuse the runtime calculations for display values so configured server values stay accurate.

Yagluth already shows its rarity-scaled multiplier and hit count, so this change leaves it unchanged. Eikthyr is handled in PR #744 because its rarity value was not applied at runtime.

Validation

• Reproduced the misleading display by comparing each English display string with the runtime values used by its effect.
• Built EpicLoot on macOS against the local Valheim assemblies.
• Build result: 0 errors.

The build reports existing environment warnings for the Windows-style Managed folder check and missing mod-tools.

[MidnightsFX]

Hey Warp- in the future can you point these towards my repo- since thats where I author everything through