doc: add missing docstring + add missing feature to README (#57)

src/fastapi_toolsets/logger.py

@@ -35,6 +35,12 @@ def configure_logging(
 
     Returns:
         The configured Logger instance.
+
+    Example:
+        from fastapi_toolsets.logger import configure_logging
+
+        logger = configure_logging("DEBUG")
+        logger.info("Application started")
     """
     formatter = logging.Formatter(fmt)
 
@@ -75,6 +81,13 @@ def get_logger(name: str | None = _SENTINEL) -> logging.Logger:  # type: ignore[
 
     Returns:
         A Logger instance.
+
+    Example:
+        from fastapi_toolsets.logger import get_logger
+
+        logger = get_logger()          # uses caller's __name__
+        logger = get_logger("myapp")   # explicit name
+        logger = get_logger(None)      # root logger
     """
     if name is _SENTINEL:
         name = sys._getframe(1).f_globals.get("__name__")