Added #

• Core SDK Client (FadSyncEmailValidator):
  • Direct email verification via FadSync MailCheck API (https://mailcheck.fadsync.com/).
  • Automatic in-memory LRU caching to eliminate redundant network calls.
  • Configurable timeouts, custom base URLs, and strictness levels.
• Rich Data Models (ValidationResult, DomainDetails, ValidationRecommendation):
  • isSafeToRegister, isBlocked, isDisposable, isFreeProvider, isRoleAccount, riskScore.
  • Smart typo detection (typoFix, hasTypoSuggestion).
  • Computed userFriendlyMessage for instant UI error display.
• 1-Click Auth Guard (FadSyncAuthGuard):
  • Protect signup, login, password reset, and newsletter subscription forms with one method call.
  • Automatic callbacks for onAllowed, onBlocked, and onTypoFound.
• Drop-in UI Widgets:
  • EmailValidatorFormField: Pre-built TextFormField with async validation debounce, animated status spinner, and error styling.
  • TypoSuggestionChip: Animated autocorrect chip allowing users to accept suggested corrections with 1 tap.
• Custom Exceptions:
  • FadSyncApiException, FadSyncAuthException, FadSyncRateLimitException, FadSyncNetworkException.
• Complete Example App:
  • Demonstrating secure registration flow with database simulation and live email risk analyzer.
• Unit & Widget Tests:
  • Mocked HTTP client tests and widget behavior assertions.