Add example app project

Example/Example.xcodeproj/project.pbxproj

...le.xcodeproj/project.xcworkspace/contents.xcworkspacedata

...project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

...ect.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

...codeproj/xcshareddata/xcschemes/ExampleApp (iOS).xcscheme

Example/ExampleApp (iOS)/Info.plist

Example/ExampleApp/App.swift

...pleApp/Assets.xcassets/AccentColor.colorset/Contents.json

...ampleApp/Assets.xcassets/AppIcon.appiconset/Contents.json

Example/ExampleApp/Assets.xcassets/Contents.json

Example/ExampleApp/ContentView.swift

Example/Package.swift