Adds ItemsAdder support for the Jax collectible icon and placeable plushie. Actual-client validation in the combined Paper 26.1.1 showcase covered Jax animation and combat.
Legacy integration files from the source release are preserved byte-identically, but those legacy integrations were not individually runtime-retested.
The poster effect styles are now implemented in game: purple stomp warnings, expanding cream shockwaves, alternating glove sparks, a curled cream projectile trail and a rising purple laugh spiral.
Uses native MythicMobs particles and animated ModelEngine hand anchors. The owner checked and accepted the live result. Damage and animation timings are preserved.
Updating 1.1.0: replace Skills/JaxBoss.yml, add Skills/JaxEffects.yml, then run /mm reload. No client pack rebuild is needed. Full installation instructions remain in instructions.txt.
