feat: user journey flow improvements

[rafaelsnv]

Summary

Implement user journey flow improvements including authentication, carnival block management, meetings, and members features with enhanced error handling and core UI components.

Changes

Configuration Updates

• Updated Flutter and Android Gradle configuration
• Added new analyzer rules and analysis options
• Updated .gitignore with proper exclusions

New Features

Authentication

• Enhanced login screen with improved form validation
• Updated signup screen with better UX
• Added email verification screen
• Implemented logout functionality

Carnival Blocks

• Block list with search and filtering
• Block details view
• Create new block functionality
• Edit existing block
• Join block feature

Meetings

• Create meeting form
• Edit meeting functionality
• Meeting details with presence tracking
• User meetings list view

Members

• Members list with search
• Member profile management

Refactoring

Removed

• Settings cubit and state (simplified settings flow)

Updated

• Core error handling with ApiError and UserMessage
• Dependency injection configuration
• Main app initialization
• Home screen navigation

Files Changed

• 41 files changed, 633 insertions(+), 458 deletions(-)
• lib/ - Application code
• pubspec.yaml / pubspec.lock - Dependencies
• android/ - Android build configuration
• analysis_options.yaml - Linting rules