feat: initial release v0.1.0

- Custom Keyboard Extension with push-to-talk UI
- iOS 26 SpeechAnalyzer + DictationTranscriber (iOS 18 SF fallback)
- OpenAI-compatible LLM client (4 built-in providers + custom)
- 3-page onboarding flow + provider config UI
- App Group shared storage for cross-process config
- 8s LLM timeout with raw-transcript fallback
- App Store privacy manifests for both targets
- SwiftLint + XcodeGen + GitHub Actions CI
- Unit tests (4/4 passing)

OpenLessShared/Constants/AppGroup.swift

@@ -0,0 +1,21 @@
+// AppGroup.swift
+// OSGKeyboard · Shared
+//
+// App Group identifier shared between main app and keyboard extension.
+// UserDefaults(suiteName:) and file containers use this.
+
+import Foundation
+
+public enum AppGroup {
+    /// App Group container identifier (must match entitlements in both targets)
+    public static let identifier = "group.com.osgkeyboard.ios"
+
+    /// Shared UserDefaults instance for cross-process config
+    public static var defaults: UserDefaults {
+        guard let d = UserDefaults(suiteName: identifier) else {
+            assertionFailure("App Group \(identifier) not configured in entitlements")
+            return .standard
+        }
+        return d
+    }
+}