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/FlowActivityAttributes.swift

@@ -0,0 +1,22 @@
+// FlowActivityAttributes.swift
+// OSGKeyboard · Live Activity
+//
+// Shared ActivityKit model compiled into the widget extension and the
+// main app so `FlowLiveActivityController` can start/update sessions.
+
+import ActivityKit
+import Foundation
+
+/// Live Activity shown in the Dynamic Island while a Flow session is active.
+struct FlowActivityAttributes: ActivityAttributes {
+    /// Dynamic content updated as the user records and processes speech.
+    struct ContentState: Codable, Hashable, Sendable {
+        var phase: Phase
+
+        enum Phase: String, Codable, Hashable, Sendable {
+            case idle
+            case recording
+            case processing
+        }
+    }
+}