feat: add domain models and repositories for user, spool presets, and filaments

- Introduced SpoolPreset and User domain models with necessary DTOs and utility functions.
- Created AuthRepository, FilamentRepository, and SpoolPresetRepository interfaces for authentication and data management.
- Implemented UI components for filament display, including ColorSwatch, FilamentCard, and StockBar.
- Developed layout components such as Header and Screen for consistent app structure.
- Added reusable UI components like Badge, Button, Card, and Input for better user interaction.
- Established global constants and theme settings for consistent styling across the application.
- Implemented utility functions for filament calculations and formatting.
- Created Zustand stores for managing authentication, filament, and preset states.
- Configured TypeScript settings for improved development experience.

mobile/.env.example

@@ -0,0 +1,14 @@
+# URL base da API do backend Rust
+# Em desenvolvimento, aponta para o localhost na porta do backend (8080)
+# No Android Emulator, use http://10.0.2.2:8080/api/v1
+# No dispositivo físico, use o IP da sua máquina: http://192.168.x.x:8080/api/v1
+EXPO_PUBLIC_API_URL=http://localhost:8080/api/v1
+
+# OAuth Google (mesmo Client ID usado no backend)
+EXPO_PUBLIC_GOOGLE_CLIENT_ID=seu_google_client_id.apps.googleusercontent.com
+
+# Deep link scheme (deve bater com app.json → scheme)
+EXPO_PUBLIC_APP_SCHEME=meowspool
+
+# Ambiente
+EXPO_PUBLIC_APP_ENV=development