feat(flow): Live Activity Dynamic Island branding and mis PrimaryLanguage

- Add OSGKeyboardLiveActivity widget extension (ActivityKit) with branded
  compactLeading mark in the Dynamic Island during Flow sessions
- Wire FlowLiveActivityController into FlowSessionManager lifecycle
- Set keyboard PrimaryLanguage to mis in project.yml, Info.plist, and at runtime
- Enable NSSupportsLiveActivities on main app and widget extension targets

Co-authored-by: Rocky <hkgood@users.noreply.github.com>

OSGKeyboardLiveActivity/OSGKeyboardLiveActivityBundle.swift

@@ -0,0 +1,12 @@
+// OSGKeyboardLiveActivityBundle.swift
+// OSGKeyboard · Live Activity
+
+import SwiftUI
+import WidgetKit
+
+@main
+struct OSGKeyboardLiveActivityBundle: WidgetBundle {
+    var body: some Widget {
+        FlowLiveActivityWidget()
+    }
+}