feat: add pytest configuration and implement tests for file and metadata extraction

renamer/test/conftest.py

@@ -0,0 +1,15 @@
+# conftest.py - pytest configuration
+import os
+import sys
+
+# Force UTF-8 encoding for all I/O operations
+os.environ['PYTHONIOENCODING'] = 'utf-8'
+if hasattr(sys.stdout, 'reconfigure'):
+    sys.stdout.reconfigure(encoding='utf-8')
+if hasattr(sys.stderr, 'reconfigure'):
+    sys.stderr.reconfigure(encoding='utf-8')
+
+# Configure pytest to handle Unicode properly
+def pytest_configure(config):
+    # Ensure UTF-8 encoding for test output
+    config.option.capture = 'no'  # Don't capture output to avoid encoding issues