Support Swift Ecosystem Code Indexing

Problem to Solve

Swift is the primary language for iOS, macOS, watchOS, and tvOS development. Swift is widely used by mobile development teams, Apple ecosystem developers, and organizations building native applications for Apple platforms. Swift code is also increasingly used for server-side development and cross-platform applications. Currently, the Knowledge Graph lacks Swift support, limiting code intelligence features for iOS/macOS developers and mobile teams.

Proposed Solution

Implement a Swift parser that extracts code entities (classes, structs, enums, functions, protocols) and their relationships (calls, inheritance, conformance) so the Knowledge Graph can index and search Swift codebases intelligently.

/cc @michaelangeloio