Main coves client

feat: add Flutter flavors for dev/prod builds and update app icon master

- Add Android productFlavors (dev: social.coves.dev, prod: social.coves) - Create iOS flavor xcconfig files for future scheme setup - Update EnvironmentConfig to support flavor-based environment detection - Add VSCode launch configurations for easy flavor switching - Update app icon to lil_dude mascot with proper adaptive icon padding Dev flavor points to local server, prod flavor points to coves.social. Both apps can be installed side-by-side on the same device. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>