Fix int overflow in FluentBitSet.setInclusive at Integer.MAX_VALUE

[alhudz]

Repro: new FluentBitSet().setInclusive(0, Integer.MAX_VALUE) throws IndexOutOfBoundsException: toIndex < 0: -2147483648, and so does setInclusive(Integer.MAX_VALUE, Integer.MAX_VALUE).

Cause: setInclusive converts the inclusive toIndex into BitSet.set's exclusive upper bound with toIndex + 1, which overflows to Integer.MIN_VALUE when toIndex is Integer.MAX_VALUE. The Javadoc only documents a throw when an index is negative or fromIndex is larger than toIndex, so a legal top-of-range call throws instead of setting the bits.

Fix: special-case toIndex == Integer.MAX_VALUE so the range and the top bit are set without the overflowing increment; every other input keeps the existing single set call. The regression test is guarded by @EnabledIfSystemProperty(named = "test.large.heap", matches = "true") like the existing large-heap test, since bit Integer.MAX_VALUE needs the full backing array; it fails on the current code and passes with the fix.