Add converter modules (JSON, YAML, TOML, CSV)

src/converters/__init__.py

@@ -0,0 +1,45 @@
+"""Data format converters."""
+
+from .base import BaseConverter, ConversionResult
+from .json_converter import JSONConverter
+from .yaml_converter import YAMLConverter
+from .toml_converter import TOMLConverter
+from .csv_converter import CSVConverter
+
+__all__ = [
+    "BaseConverter",
+    "ConversionResult",
+    "JSONConverter",
+    "YAMLConverter", 
+    "TOMLConverter",
+    "CSVConverter",
+    "get_converter",
+]
+
+SUPPORTED_FORMATS = ["json", "yaml", "toml", "csv"]
+
+
+def get_converter(format_name: str) -> BaseConverter:
+    """Get converter instance for specified format.
+    
+    Args:
+        format_name: Format identifier (json, yaml, toml, csv)
+    
+    Returns:
+        Converter instance for the format
+    
+    Raises:
+        ValueError: If format is not supported
+    """
+    format_map = {
+        "json": JSONConverter,
+        "yaml": YAMLConverter,
+        "toml": TOMLConverter,
+        "csv": CSVConverter,
+    }
+    
+    format_lower = format_name.lower()
+    if format_lower not in format_map:
+        raise ValueError(f"Unsupported format: {format_name}. Supported formats: {SUPPORTED_FORMATS}")
+    
+    return format_map[format_lower]()