refactor code into modules

src/pg_rad/logging/logger.py

@@ -0,0 +1,21 @@
+import logging
+import logging.config
+import pathlib
+
+import yaml
+
+def setup_logger(log_level: str = "WARNING"):
+    levels = ["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]
+    
+    if not log_level in levels:
+        raise ValueError(f"Log level must be one of {levels}.")
+    
+    base_dir = pathlib.Path(__file__).resolve().parent
+    config_file = base_dir / "configs" / "logging.yml"
+
+    with open(config_file) as f:
+        config = yaml.safe_load(f)
+    
+    config["loggers"]["root"]["level"] = log_level
+
+    logging.config.dictConfig(config)