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/constants.py

@@ -0,0 +1,34 @@
+VIDEO_EXTENSIONS = {'.mkv', '.avi', '.mov', '.mp4', '.wmv', '.flv', '.webm', '.m4v', '.3gp', '.ogv'}
+
+VIDEO_EXT_DESCRIPTIONS = {
+    'mkv': 'Matroska multimedia container',
+    'avi': 'Audio Video Interleave',
+    'mov': 'QuickTime movie',
+    'mp4': 'MPEG-4 video container',
+    'wmv': 'Windows Media Video',
+    'flv': 'Flash Video',
+    'webm': 'WebM multimedia',
+    'm4v': 'MPEG-4 video',
+    '3gp': '3GPP multimedia',
+    'ogv': 'Ogg Video',
+}
+
+META_DESCRIPTIONS = {
+    'MP4': 'MPEG-4 video container',
+    'Matroska': 'Matroska multimedia container',
+    'AVI': 'Audio Video Interleave',
+    'QuickTime': 'QuickTime movie',
+    'ASF': 'Windows Media',
+    'FLV': 'Flash Video',
+    'WebM': 'WebM multimedia',
+    'Ogg': 'Ogg multimedia',
+}
+
+SOURCE_DICT = {
+    'WEB-DL': ['WEB-DL', 'WEBRip', 'WEB-Rip', 'WEB'],
+    'BDRip': ['BDRip', 'BD-Rip', 'BDRIP'],
+    'BDRemux': ['BDRemux', 'BD-Remux', 'BDREMUX'],
+    'DVDRip': ['DVDRip', 'DVD-Rip', 'DVDRIP'],
+    'HDTV': ['HDTV'],
+    'BluRay': ['BluRay', 'BLURAY', 'Blu-ray'],
+}