feat: restructure renamer package and implement media extraction features

- Updated `pyproject.toml` to reflect new package structure.
- Created `renamer/__init__.py` to initialize the package.
- Implemented `RenamerApp` in `renamer/app.py` for the main application interface.
- Added constants for video extensions in `renamer/constants.py`.
- Developed `MediaExtractor` class in `renamer/extractor.py` for extracting metadata from media files.
- Created various extractor classes in `renamer/extractors/` for handling filename, metadata, and media info extraction.
- Added formatting classes in `renamer/formatters/` for displaying media information and proposed filenames.
- Implemented utility functions in `renamer/utils.py` for detecting file types and extracting media track information.
- Introduced `OpenScreen` in `renamer/screens.py` for user input of directory paths.
- Enhanced error handling and user feedback throughout the application.

renamer/formatters/size_formatter.py

@@ -0,0 +1,17 @@
+class SizeFormatter:
+    """Class for formatting file sizes"""
+    
+    @staticmethod
+    def format_size(bytes_size: int) -> str:
+        """Format bytes to human readable with unit"""
+        for unit in ['B', 'KB', 'MB', 'GB', 'TB']:
+            if bytes_size < 1024:
+                return f"{bytes_size:.1f} {unit}"
+            bytes_size /= 1024
+        return f"{bytes_size:.1f} TB"
+    
+    @staticmethod
+    def format_size_full(bytes_size: int) -> str:
+        """Format size with both human readable and bytes"""
+        size_formatted = SizeFormatter.format_size(bytes_size)
+        return f"{size_formatted} ({bytes_size:,} bytes)"