perf(boolean-intersects): delegate flattening to booleanDisjoint

[rexxars]

booleanIntersects flattens both features into every pair of simple geometries and calls booleanDisjoint per pair. But booleanDisjoint performs the exact same nested flattenEach internally, with the inverse accumulation ("all pairs disjoint" vs "any pair intersects"). Since intersects == !disjoint holds for multi-geometries too, the entire body can be reduced to:

return !booleanDisjoint(feature1, feature2, { ignoreSelfIntersections });

This is the same category of #3011 - deduplicating/delegating to what the negated variant does, and reducing maintenance surface. I also removed @turf/meta and @turf/helpers from the package's dependencies since nothing in the package imports them anymore (helpers was unused even before this change). Let's see if CI complains.

Benchmarks show a marked improvement on my M4 MacBook Pro:

Fixture	Before	After	Change
Point-Point	9.67M	19.27M	+99%
Point-LineString-1	8.68M	16.51M	+90%
LineString-Point-2	8.65M	16.92M	+96%
MultiPoint-Point	4.73M	9.46M	+100%
MultiPoint-MultiPoint	2.62M	5.75M	+120%
Point-Polygon	6.53M	10.38M	+59%
LineString-In-Polygon	7.03M	11.97M	+70%
LineString-LineString	1.14M	1.23M	+8%
Polygon-Polygon	0.84M	0.91M	+8%
Polygon-MultiPolygon	409K	419K	+3%

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[mfedderly]

Thank you!