IG: Item Clumps

[1.0.26+26.2]

Changed

• Mixin Modernization: Replaced invasive method @Redirect on AABB.inflate(...) in ItemEntityMixin with non-invasive @ModifyExpressionValue from MixinExtras, ensuring high compatibility with other entity/performance mods.
• Player Agency & True Sandbox Freedom: Unlocked MERGE_RADIUS from .range(1, 10) to .range(1, Integer.MAX_VALUE) in accordance with the Player Agency & Anti-Nanny Invariant (lower bound 1 preserved to prevent fatal bounding box crashes).
• License Header Standardization: Normalized headers to single-line GPLv3 format.