Exposes a fake-backed SessionHandle for Swift integration tests and app shell work.
Mirrors the tele-core::session DTO/event model with UniFFI-compatible records and enums.
Keeps real TDLib session creation out of this crate until iOS simulator/device linking is validated.

Generate Swift bindings and headers:

scripts/generate-ios-ffi-bindings.sh

The script builds target/release/libtele_ios_ffi.a and writes Swift sources, headers, a Swift typecheck-friendly tele_ios_ffiFFI module map, and an XCFramework-compatible module map under build/ios-ffi/.

Known blocker:

xcodebuild -version currently fails on this machine because only Command Line Tools are selected: xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance.
Real TDLib iOS simulator/device linking therefore is not validated in this phase.