feat: add UnityFramework pod library

- Add UnityFramework.framework with iOS 13.0+ support
- Configure podspec with proper dependencies and xcconfig
- Add EXCLUDED_ARCHS for simulator compatibility
- Include all Unity data and resources

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

UnityLibrary/UnityFramework.podspec

@@ -0,0 +1,55 @@
+Pod::Spec.new do |s|
+  s.name             = 'UnityFramework'
+  s.version          = '1.0.0'
+  s.summary          = 'Local Unity iOS Framework'
+  s.description      = 'Local development pod for Unity iOS export.'
+  s.homepage         = 'http://localhost'
+  s.license          = { :type => 'MIT' }
+  s.author           = { 'dev' => 'dev@local' }
+
+  # Unity iOS 工程路径
+  s.source           = { :path => '.' }
+
+  # iOS 13 起
+  s.platform     = :ios, '13.0'
+
+  # UnityFramework.framework
+  s.vendored_frameworks = 'UnityFramework.framework'
+
+  # 注意：Data 在 framework 内部，会自动包含
+  # 如需额外资源可在此添加
+
+  # 保留所有符号
+  s.preserve_paths = [
+    'UnityFramework.framework'
+  ]
+
+  # 链接依赖
+  s.frameworks = [
+    'ARKit', 'AVFoundation', 'AudioToolbox', 'CoreGraphics',
+    'CoreMedia', 'CoreMotion', 'CoreVideo', 'GameController',
+    'Metal', 'OpenGLES', 'QuartzCore', 'UIKit', 'WebKit',
+    'Security', 'MobileCoreServices'
+  ]
+
+  s.libraries = 'z', 'c++'
+
+  # 允许非模块化头
+  s.pod_target_xcconfig = {
+    'CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES' => 'YES',
+    'ENABLE_BITCODE' => 'NO',
+    # 模拟器排除 arm64（当 framework 不包含模拟器架构时）
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'arm64'
+  }
+
+  s.user_target_xcconfig = {
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'arm64'
+  }
+
+  # 如需同时支持真机和模拟器，请：
+  # 1. 从 Unity 导出模拟器版本的 framework
+  # 2. 使用 lipo 合并：
+  #    lipo -create Device/UnityFramework Simulator/UnityFramework -output UnityFramework
+  # 3. 然后移除上面的 EXCLUDED_ARCHS 配置
+end
+