feat(logging): add configurable logging with file output support

Introduce --log-level and --log-file CLI arguments.
Add execution time tracking and detailed logs across all modules.

src/uipath_explainator/logging_utils.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from pathlib import Path
+import logging
+
+
+LOG_FORMAT = "%(asctime)s %(levelname)s [%(name)s] %(message)s"
+
+
+def configure_logging(level_name: str = "INFO", log_file: Path | None = None) -> None:
+    level = getattr(logging, level_name.upper(), logging.INFO)
+    formatter = logging.Formatter(LOG_FORMAT)
+
+    handlers: list[logging.Handler] = [logging.StreamHandler()]
+    if log_file is not None:
+        log_file.parent.mkdir(parents=True, exist_ok=True)
+        handlers.append(logging.FileHandler(log_file, encoding="utf-8"))
+
+    root_logger = logging.getLogger()
+    root_logger.handlers.clear()
+    root_logger.setLevel(level)
+
+    for handler in handlers:
+        handler.setLevel(level)
+        handler.setFormatter(formatter)
+        root_logger.addHandler(handler)
+
+    logging.captureWarnings(True)