fix(ci): correct playwright config paths and add env example files

- Fix testDir path from './src/__tests__/e2e' to './e2e'
- Fix globalSetup path from './src/__tests__/e2e/global.setup' to './e2e/global.setup'
- Create .env.development.example with development database configuration
- Update .gitignore to allow .env.example files to be tracked

.env.development.example

@@ -0,0 +1,15 @@
+# Development environment configuration for EuchreCamp
+# Copy this file to .env.development and fill in your values
+
+# Database Configuration
+DATABASE_PROVIDER=postgresql
+# Development database URL - must contain "_dev" to pass safety checks
+DATABASE_URL="postgresql://euchre_camp:password@localhost:5432/euchre_camp_dev"
+
+# Authentication
+BETTER_AUTH_SECRET="your-secret-key-change-this"
+BETTER_AUTH_URL="http://localhost:3000"
+
+# Application Configuration
+NODE_ENV=development
+TRUSTED_ORIGINS="http://localhost:3000,http://127.0.0.1:3000"