Rebrand project to neo-pod-desktop with updated description and improvements

- Rename project from 'youtube-to-ipod-nano' to 'neo-pod-desktop' across all files
- Update description: 'Desktop application for downloading, converting,
  managing and transferring music to iPod Nano devices'
- Update setup.py: name, description, url, entry_points, author
- Update run.py: docstring and argparse description
- Update src/__init__.py: module docstring
- Update src/main.py: docstring, window title, about label
- Update src/cli.py: docstring, class docstring, argparse description
- Update README.md: title and project description
- Improve duplicate track detection in ipod_nano7_db.py:
  case-insensitive matching, bulk removal with file cleanup

src/cli.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """
-Command Line Interface for iPod Nano Transfer Tool
-Provides a CLI for the YouTube Music to iPod Nano transfer tool
+Command Line Interface for neo-pod-desktop
+Provides a CLI for downloading, converting, managing and transferring music to iPod Nano devices
 """
 
 import os
@@ -25,7 +25,7 @@ logger = logging.getLogger(__name__)
 
 
 class YouTubeToIPodCLI:
-    """Command Line Interface for YouTube to iPod Nano Transfer Tool"""
+    """Command Line Interface for neo-pod-desktop"""
     
     def __init__(self):
         """Initialize the CLI"""
@@ -43,7 +43,7 @@ class YouTubeToIPodCLI:
     def parse_arguments(self):
         """Parse command line arguments"""
         parser = argparse.ArgumentParser(
-            description="YouTube to iPod Nano Transfer Tool",
+            description="neo-pod-desktop",
             formatter_class=argparse.ArgumentDefaultsHelpFormatter
         )