bug(parsers/kotlin): object A { fun x() = 1 } on one line is never indexed #1600

Split out of #1595 (report 1 of 9) — filed by @rrodriguesNutrium, credit to them.

KOTLIN_QUERIES["classes"]'s (object_declaration (type_identifier) @name) pattern (kotlin.py:17) never matches a single-line object body:

object A { }                        // captured
object A {\n    fun x() = 1\n}      // captured
object A { fun x() = 1 }            // ZERO captures

The grammar misparses the one-line form into an infix_expression containing an object_literal and a lambda_literal, so the object_declaration node the query looks for is never produced. The sibling class_declaration pattern handles inline bodies fine.

Effect: singletons written on one line — a common Kotlin idiom — are silently missing from the graph.