Fix Adventure 5 compatibility: ClickEvent.Action is no longer an enum

[renovate]

Adventure 5 changed ClickEvent.Action from an enum to a sealed class hierarchy with static constants and an Index<String, Action<?>> registry. This broke compilation in three places that relied on enum-specific APIs (values(), valueOf(), EnumSet).

Changes

• Settings.java — ClickEvent.Action.values() + Enum::name → ClickEvent.Action.NAMES.keys() (returns Set<String>)
• ClickStripTransform.java — EnumSet.copyOf → Set.copyOf; field/constructor typed as Set<ClickEvent.Action<?>> / Set<? extends ClickEvent.Action<?>>
• ComponentTransform.java — stripClicks vararg typed as ClickEvent.Action<?>... with @SafeVarargs
• CaptionUtility.java — ClickEvent.Action::valueOf → ClickEvent.Action.NAMES::value; array-based stripClicks(stream.toArray(...)) replaced with new ClickStripTransform(stream.collect(Collectors.toUnmodifiableSet())) to avoid raw generic arrays
• ClickStripTransformTest.java — EnumSet.of(action) → Set.of(action); EnumSet.allOf(ClickEvent.Action.class) → new HashSet<>(ClickEvent.Action.NAMES.values())

[renovate]

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