Complete Phase 3: Text injection with permissions management

- Implement text injection with paste method (NSPasteboard + ⌘V)
- Add typing fallback with Unicode support and keyboard layout respect
- Integrate secure input detection using IsSecureEventInputEnabled()
- Add comprehensive permission checking and management
- Create Permissions tab in preferences with status indicators
- Add permission onboarding flow for new users
- Implement automatic fallback between injection methods
- Add deep links to System Settings for permission grants
- Remove duplicate preferences menu item
- Create development build script for easier testing
- Update Phase 3 tasks as completed in TODO.md

Package.swift

@@ -60,7 +60,7 @@ let package = Package(
 
         .target(
             name: "CoreInjection",
-            dependencies: ["CoreUtils"],
+            dependencies: ["CoreUtils", "CorePermissions"],
             path: "Sources/CoreInjection"
         ),