feat: add function to filter important files in codebase

aider/special.py

@@ -0,0 +1,44 @@
+import os
+
+def filter_important_files(file_paths):
+    """
+    Filter a list of file paths to return only those that are commonly important in codebases.
+    
+    :param file_paths: List of file paths to check
+    :return: List of file paths that match important file patterns
+    """
+    important_files = [
+        # Version Control
+        '.gitignore', '.gitattributes',
+        # Package Management and Dependencies
+        'requirements.txt', 'Pipfile', 'pyproject.toml', 'package.json', 'package-lock.json', 'yarn.lock',
+        'Gemfile', 'Gemfile.lock', 'composer.json', 'composer.lock', 'pom.xml', 'build.gradle', 'go.mod', 'go.sum',
+        # Project Configuration
+        '.editorconfig', '.eslintrc', '.pylintrc', 'tsconfig.json',
+        # Build and Compilation
+        'Makefile', 'webpack.config.js', 'gulpfile.js',
+        # CI/CD
+        '.travis.yml', '.gitlab-ci.yml', 'Jenkinsfile',
+        # Docker
+        'Dockerfile', 'docker-compose.yml',
+        # Environment Variables
+        '.env', '.env.example',
+        # Deployment
+        'Procfile', 'vercel.json', 'netlify.toml', 'app.yaml',
+        # Documentation
+        'README.md', 'CONTRIBUTING.md', 'LICENSE', 'CHANGELOG.md',
+        # Language-specific
+        'setup.py', '__init__.py', 'Rakefile', '.babelrc', '.npmrc', '.htaccess',
+        # Framework-specific
+        'manage.py', 'settings.py', 'routes.rb',
+        # Testing
+        'pytest.ini', 'phpunit.xml', 'karma.conf.js',
+        # Security
+        '.npmrc', '.pypirc'
+    ]
+    
+    def is_important(file_path):
+        file_name = os.path.basename(file_path)
+        return file_name in important_files or any(file_path.endswith(f'/{name}') for name in important_files)
+    
+    return list(filter(is_important, file_paths))