Legacy Achievements Reforged

Legacy Achievements Reforged — 0.5.1-alpha.1
Changes since 0.5.0-alpha:

• Added classic gold achievement popups with fade, glow, and shine animations.
• Refined popup title centering and point-shield alignment.
• Bundled the achievement chime for direct audio-file playback, with alternative sounds available.
• Added addon settings for notification sound, animation, duration, position, and scale, plus preview buttons.
• Moved tracked custom achievements into the client’s objective tracker alongside quests, with cached updates and combat-safe deferral.
• Replaced the inherited addon icon with the project’s hammer-and-anvil emblem.
• Fixed GitHub release packaging so installable ZIPs and checksums publish correctly.

Existing achievement progress, point calculations, and native Legacy Rewards and Trees are preserved.