feat: add cucumber gherkin-style E2E test framework

- Install @cucumber/cucumber and cucumber-pretty dependencies
- Create Cucumber configuration with tsx loader for TypeScript support
- Add step definitions for common navigation, form interactions, and assertions
- Add authentication step definitions for login/logout flows
- Create feature files for user registration and authentication
- Support multiple auth contexts (player, tournament admin, club admin)
- Configure package.json scripts for running Cucumber tests

Key features:
- Gherkin syntax (Given/When/Then) for behavior-driven testing
- Browser-only interactions (no direct database access)
- Dev site testing (tests run against running dev server)
- Happy path focus for acceptance testing
- Integration with existing TypeScript project

e2e/cucumber/cucumber.config.ts

@@ -0,0 +1,40 @@
+/**
+ * Cucumber configuration for EuchreCamp E2E tests
+ */
+
+module.exports = {
+  // Paths to feature files
+  paths: ['e2e/cucumber/features/**/*.feature'],
+
+  // Paths to step definitions
+  import: ['e2e/cucumber/step-definitions/**/*.ts'],
+
+  // Use tsx loader for TypeScript with path aliases
+  requireModule: ['tsx'],
+
+  // Format options
+  format: [
+    'progress-bar',
+    'pretty:cucumber-pretty'
+  ],
+
+  // Output directory for reports
+  formatOptions: {
+    snippetInterface: 'async-await'
+  },
+
+  // Tags to run (can be overridden via command line)
+  tags: 'not @wip and not @skip',
+
+  // Fail fast on first error
+  failFast: false,
+
+  // Retry failed tests (useful in CI)
+  retry: process.env.CI ? 2 : 0,
+
+  // Dry run (just list scenarios without executing)
+  dryRun: false,
+
+  // Strict mode (fail on undefined steps)
+  strict: true,
+};