feat: Introduce modern E2E test suite for Task Master AI

tests/e2e/config/test-config.js

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+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+import { config as dotenvConfig } from 'dotenv';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+// Load environment variables
+const projectRoot = join(__dirname, '../../..');
+dotenvConfig({ path: join(projectRoot, '.env') });
+
+export const testConfig = {
+  // Paths
+  paths: {
+    projectRoot,
+    sourceDir: projectRoot,
+    baseTestDir: join(projectRoot, 'tests/e2e/_runs'),
+    logDir: join(projectRoot, 'tests/e2e/log'),
+    samplePrdSource: join(projectRoot, 'tests/fixtures/sample-prd.txt'),
+    mainEnvFile: join(projectRoot, '.env'),
+    supportedModelsFile: join(projectRoot, 'scripts/modules/supported-models.json')
+  },
+
+  // Test settings
+  settings: {
+    runVerificationTest: true,
+    parallelTestGroups: 4, // Number of parallel test groups
+    timeout: 600000, // 10 minutes default timeout
+    retryAttempts: 2
+  },
+
+  // Provider test configuration
+  providers: [
+    { name: 'anthropic', model: 'claude-3-7-sonnet-20250219', flags: [] },
+    { name: 'openai', model: 'gpt-4o', flags: [] },
+    { name: 'google', model: 'gemini-2.5-pro-preview-05-06', flags: [] },
+    { name: 'perplexity', model: 'sonar-pro', flags: [] },
+    { name: 'xai', model: 'grok-3', flags: [] },
+    { name: 'openrouter', model: 'anthropic/claude-3.7-sonnet', flags: [] }
+  ],
+
+  // Test prompts
+  prompts: {
+    addTask: 'Create a task to implement user authentication using OAuth 2.0 with Google as the provider. Include steps for registering the app, handling the callback, and storing user sessions.',
+    updateTask: 'Update backend server setup: Ensure CORS is configured to allow requests from the frontend origin.',
+    updateFromTask: 'Refactor the backend storage module to use a simple JSON file (storage.json) instead of an in-memory object for persistence. Update relevant tasks.',
+    updateSubtask: 'Implementation note: Remember to handle potential API errors and display a user-friendly message.'
+  },
+
+  // LLM Analysis settings
+  llmAnalysis: {
+    enabled: true,
+    model: 'claude-3-7-sonnet-20250219',
+    provider: 'anthropic',
+    maxTokens: 3072
+  }
+};
+
+// Export test groups for parallel execution
+export const testGroups = {
+  setup: ['setup'],
+  core: ['core'],
+  providers: ['providers'],
+  advanced: ['advanced']
+};