[GSoC 2026] Qualified Name Lookup for swift-syntax

Introduction As part of Google Summer of Code 2026, I implemented a preliminary version of qualified name lookup in swift-syntax under the mentorship of Pavel Yaskevich (@xedin). Building on Jakub Florek’s GSoC 2024 unqualified-name-lookup project, this effort exposes syntactic queries formerly confined to the Swift compiler as an easy-to-use API in the swift-syntax package. Now, swift-syntax can find definitions of types and type members, like a simplified version of an editor’s “jump to defin...