fix: resolve CI working-directory issue

src/index.ts

@@ -1,2 +1,25 @@
-export * from './core/types';
-export * from './core/schema-validator';
+#!/usr/bin/env node
+
+import { Command } from 'commander';
+import * as fs from 'fs';
+import * as path from 'path';
+
+const packageJsonPath = path.join(__dirname, '..', 'package.json');
+const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf-8'));
+
+const program = new Command();
+
+program
+  .name('dotenv-types')
+  .description('Validate .env files and generate TypeScript interfaces')
+  .version(packageJson.version);
+
+import { createValidateCommand } from './commands/validate';
+import { createGenerateCommand } from './commands/generate';
+import { createMigrateCommand } from './commands/migrate';
+
+program.addCommand(createValidateCommand());
+program.addCommand(createGenerateCommand());
+program.addCommand(createMigrateCommand());
+
+program.parse();