feat: Introduce DefaultExtractor for fallback values and refactor extraction logic in MediaExtractor

renamer/extractors/default_extractor.py

@@ -0,0 +1,50 @@
+class DefaultExtractor:
+    """Extractor that provides default fallback values"""
+
+    def extract_title(self):
+        return "Unknown Title"
+
+    def extract_year(self):
+        return None
+
+    def extract_source(self):
+        return None
+
+    def extract_resolution(self):
+        return None
+
+    def extract_hdr(self):
+        return None
+
+    def extract_movie_db(self):
+        return None
+
+    def extract_audio_langs(self):
+        return None
+
+    def extract_meta_type(self):
+        return None
+
+    def extract_size(self):
+        return None
+
+    def extract_modification_time(self):
+        return None
+
+    def extract_file_name(self):
+        return None
+
+    def extract_file_path(self):
+        return None
+
+    def extract_frame_class(self):
+        return None
+
+    def extract_video_tracks(self):
+        return []
+
+    def extract_audio_tracks(self):
+        return []
+
+    def extract_subtitle_tracks(self):
+        return []