iOS and Android project detection: no Swift edit needed, reruns on directory change

What

Claude Code tries to detect what kind of project you are working on, such as an iOS or Android app, and reports it to SDK hosts in a dev_intent message.

• An ios_app detection no longer needs Claude to have edited a .swift file when the evidence is strong: running xcodebuild, xcrun or swift for an iOS SDK, or simctl or devicectl; writing iOS source, such as a UIKit import, into .swift, .m, .mm or .h files; or reading or writing iOS build settings in the Xcode project. A quoted command, a here-document or a comment does not count. Weaker evidence still needs a .swift edit. The detector records this as conclusiveEvidence.
• Reading an xcconfig file now counts as xcode_project.
• The ios_app and android_app detector gains directoryChanged(): it starts the detector if it has not started yet, and otherwise checks again.
• Cleanup of the global config file now also removes the old per-project devIntentsDetected key, and fixes a check of hasCompletedProjectOnboarding that tested the wrong variable.

Why

iOS projects are recognised in more cases, the project-type hint follows you when you move into another repository, and the global config file loses stale per-project entries.