(feat) rename style and fix initial theme

App.js

src/auth/ForgotScreen.js

src/auth/LoginScreen.js

src/auth/RegisterForm.js

src/onboarding/OnboardingScreenNew.js

src/onboarding/steps/AllDoneStep.js

src/onboarding/steps/ChannelSetupStepNew.js

src/onboarding/steps/HashtagsStepNew.js

src/onboarding/steps/SuggestedChannelsStepNew.js

src/onboarding/steps/SuggestedGroupsStepNew.js

src/onboarding/steps/WelcomeStepNew.js

src/settings/SettingsScreen.js

src/settings/SettingsStore.js

src/styles/ThemedStyles.js